Sound moves through the air at a speed of around 343 meters per second, which is 1234.8 km/h or 767 mph (at 20 °C / 68 °F). It means that a sound wave in air needs about 2.9 seconds to travel one kilometer, or 4.7 seconds to travel a mile - this data might be useful for storm-hunters to determine the lighting distance Miles per hour Kilometers per hour; 20 mph: 32.19 kph: 21 mph: 33.80 kph: 22 mph: 35.41 kph: 23 mph: 37.01 kph: 24 mph: 38.62 kph: 25 mph: 40.23 kph: 26 mph: 41.84 kph: 27 mph: 43.45 kph: 28 mph: 45.06 kph: 29 mph: 46.67 kph: 30 mph: 48.28 kph: 31 mph: 49.89 kph: 32 mph: 51.50 kph: 33 mph: 53.11 kph: 34 mph: 54.72 kph: 35 mph: 56.33 kph: 36 mph: 57.94 kph: 37 mph: 59.55 kph: 38 mph: 61.16 kph: 39 mph: 62.76 kp Example 1: ----- Speed: 50 mile per hour (km/h) Distance: 70 miles Time = Distance / Speed Time = 70 km / (50 km/h) Time = 1.4 h 1 hour = 60 minutes 0.4 h = 0.4 × 60 0.4 h = 24 minutes Time = 1 hour 24 minutes Time = 01:24:00 (HH:MM:SS) Example 2: ----- Speed: 40 kilometer per hour (km/h) Distance: 60 miles Time = Distance / Speed Time = 60 miles / (40 km/h) 1 mile = 1.609344 km Time = 60. The quick way to see how fast you run in km and miles 1 kilometer per hour (kph) = 0.621371192 mile per hour (mph
Type the speed you want to convert in the text box, to see the results in the table. I want to convert : Kilometre per hour (km/h) Mile per hour (mph) Minutes per km (min/km) Minutes per mile (min/mi) Minutes per 400 m (min/400m) Minutes per 1500 m (min/1500m) Minutes per 800 yards (min/800yd How to calculate running pace per mi/km Divide the total time in minutes for the run with the distance (after converting miles to km), this will the give the min/km pace. If you want to convert to min/mi you can convert the km distance to miles by multiplying by 1.609 before dividing by the time taken. How to calculate averge running speed Pace is the rate of movement, or more precisely: the rate of covering a given distance. For example, your pace can be 10 minutes per mile, or 10 minutes per kilometer, or 20 seconds per 100 meters, so pace describes how long it takes you to cover a given distance unit
If v min/mi = 11 then v min/km = 0.621371192237 × 11 = 6.835083114607 min/km Note: Minute per mile is an imperial or United States customary unit of speed. Minute per kilometer is a metric unit of speed Write a Java program to display the speed, in meters per second, kilometers per hour and miles per hour. User Input : Distance (in meters) and the time was taken (as three numbers: hours, minutes, seconds). Note : 1 mile = 1609 meters. Test Data Input distance in meters: 2500 Input hour: 5 Input minutes: 56 Input seconds: 23. Sample Solution. This free pace calculator computes pace, time, and distance, given values for two of the variables. It can also be used for training purposes through the multipoint pace calculator, convert between units of pace, and estimate a finish time. Learn more about heart rate zones and different types of exercise, or explore hundreds of other calculators addressing math, finance, health, fitness, and. Wind Speed Conversion by Tim Brice and Todd Hall Enter a wind speed that you would like: Answers: mph (miles per hour) mph: knots: knots: m/s (meters per second) m/s: ft/s (feet per second) ft/s: km/h (kilometers per hour) km/h What are the formula for the wind speed conversion script? Follow us on Twitter Follow us on Facebook Follow us on YouTube EPZ RSS Feed Current Hazards Outlooks.
Speed Limit for Various Types of Driving. Kilometers per hour: Miles per hour: You're driving too fast: 120 kph: 75 mph: Multi-lane highway driving: 100 kph: 62 mph: Most 2-lane highways outside cities and towns: 80 kph: 50 mph: Major roads in urban and suburban areas: 60 to 70 kph: 37 to 44 mph: Residential streets: 40 to 50 kph: 25 to 30 mph. mph Miles per hour [mph → km/h ] Miles per hour to Kilometres per hour[mph → km/s ] Miles per hour to Kilometres per second[mph → knot ] Miles per hour to Knots[mph → m/s ] Miles per hour to Metres per second[mph → mm/s ] Miles per hour to Millimetres per second[mph → µm/s ] Miles per hour to Micrometres per secondMiles per hour to Speed of light. From www.PhysicsAccordingtoPalladino.orgThis can be viewed as either a conversion problem, or an average speed problem. Calculating your average running spee..
Kilometers Per Hour. Kilometers per hour are a measurement of speed expressing the distance traveled in kilometers in one hour.. The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system. Kilometers per hour can be abbreviated as km/h, and are also sometimes abbreviated as kph.For example, 1 kilometer per hour can be written as 1 km/h or 1 kph Age can influence how fast you run. Most runners reach their fastest speed between the ages of 18 and 30. The average running speed per mile in a 5K (5-kilometer or 3.1-mile race) is below Walt Disney Studios präsentiert Jan de Bonts Action-Thriller Speed in 4K. Disney bringt Speed 4K am 27. Mai 2021 auf den Markt Definition: The unit miles per hour (symbol: mph) is a measurement of speed in the imperial and United States customary systems. It expresses the number of statute miles traveled over the period of one hour. One mph equals exactly 1.609344 kilometers per hour (km/h)
For most science applications, the SI unit for speed and velocity is meters per second (m/s), although kliometers per hour (km/h) is sometimes used when measuring the speed of vehicles. The English system usually expresses speed as miles per hour (mph) or sometimes feet per second (ft/s), while marine vessels typically use knots, or nautical miles per hour The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.150 78 mph or 0.514 m/s). The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (); kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation. Running Pace Converter. Use this running pace converter to convert your running pace from minutes per kilometer (min/km) to minutes per mile (min/mile) or from minutes per mile (min/mi) back to minutes per kilometer (min/km). The running Pace Converter will also show you your running pace in kilometers per hour (km/hr) and miles per hour (miles/hr) Millimeter per Hour is the smallest unit for Speed. It is 2.77777777777778E-07 times smaller than Meter per Second Next, let's look at an example showing the work and calculations that are involved in converting from miles per hour to millimeters per second (mph to mm/s). Miles per hour to Millimeters per second Conversion Example Task: Convert 250 miles per hour to millimeters per second (show work) Formula: mph x 447.04 = mm/s Calculations: 250 mph x 447.04 = 111,760 mm/s Result: 250 mph is equal to 111,760 mm/
. If you are starting out this will be slower than if you are a conditioned runner. Then, refer to the treadmill chart to determine the BPM you should choose. The paces listed are ok within + 1 Mile or Km per hour. run2rhythm running music will help you learn how to run with a consistent rhythmic pace. Our research with. Set the treadmill speed at a pace you can comfortably run at for 15 minutes. If you are starting out this will be slower than if you are a conditioned runner. Then, refer to the treadmill chart to determine the BPM you should choose. The paces listed are ok within + 1 Mile or Km per hour The run2rhythm program is essentially coupling running cadence to music. run2rhythm running music will help. Record of 1990 Overview. Operations TGV 117 and TGV 140, referring to target speeds in metres per second, were carried out by SNCF from November 1989 to May 1990.The culmination of these test programs was a new world speed record of 515.3 km/h (143.1 m/s or 320.3 mph), set on 18 May 1990.. The record runs took place in two separate campaigns, separated by a period of modifications to trainset 325 Since 1 mile = 5280 feet = 63,360 inches, and 1 hour = 60 minutes, then the conversion from inches per minute to miles per hour is ( 60 / 63,360 ). So, if the engine is turning 6000 rev/min then the car must be going (60 / 63,360) * ( ( 6000 * 6.28 * r) / (R1*R2) miles/hour. Rewriting that all into a tidy form
A mile per hour is a unit of speed commonly used in the United States. It is equal to exactly 1.609344 kilometers per hour. A kilometer per hour is a unit of speed. Something traveling at one kilometer per hour is traveling about 0.278 meters per second, or about 0.621 miles per hour You can convert between miles per hour, meters per second and kilomoters per hour. Calculate how much time you save by increasing the speed. This calculation will calculated how much time you save (or lose) per hour, by increasing or decreasing the speed of your vehicle It is customary in various sports to measure pace instead of speed. Pace is measured as the time it takes to cover a certain distance. minutes per mile to minutes per kilometer. minutes per mile to seconds per kilometer. minutes per mile to time per kilometer(HH:MM:SS) minutes per mile to seconds per 100 metres Speed conversions between miles per hour (mph, miph, m/h, mi/h) and kilometres per hour (kph, kmph, km/h) are usually used for calculating speed limits when driving abroad, espcially for UK and US drivers.Miles per hour are used in the United States and in the UK. Despite the UK having legally converted to metric for most measures, miles and miles per hour are still used on all road signs
3.6 km/h ≡ 1 m/s, the SI unit of speed, metre per second; 1 km/h ≈ 0.277 78 m/s; 1 km/h ≈ 0.621 37 mph ≈ 0.911 34 ft/s; 1 kn ≡ 1.852 km/h (exactly) 1 mph ≡ 1.609 344 km/ Type the speed you want to convert in the text box, to see the results in the table. Jeg ønsker å konvertere. : km/t (km/h) Miles pr time (mph) Minutes per km (min/km) Minutes per mile (min/mi) Minutes per 400 m (min/400m) Minutes per 1500 m (min/1500m) Minutes per 800 yards (min/800yd) -. Er lik Wind Speed Converter - Convert wind speeds between Miles per hour, kilometers per hour, knots, metres per second, feet per second Online Calculators - Online Converters - Unit Measurement Translator Miles per hour is a unit of speed, expressing the number of international miles covered per hour. It is commonly abbreviated in everyday use in the United States, the United Kingdom, and elsewhere to mph or MPH, although mi/h is sometimes used in technical publications. ›› Definition: Kilometer/hour. The kilometre per hour (American English: kilometer per hour) is a unit of both speed.
Online calculator. Knot is a nautical speed measure. 1 knot = 1 nautical mile per hour 25000 Kilometres per hour = 15534.28 Miles per hour: 5 Kilometres per hour = 3.1069 Miles per hour: 50 Kilometres per hour = 31.0686 Miles per hour: 50000 Kilometres per hour = 31068.56 Miles per hour: 6 Kilometres per hour = 3.7282 Miles per hour: 100 Kilometres per hour = 62.1371 Miles per hour: 100000 Kilometres per hour = 62137.11 Miles per hou
Convert pace to speed, and speed to pace both mile and km. If you run 1mile in 7 minutes, you run 8.5miles in 1 hour, and run 1km in 4 minutes 20 seconds. This calculator convert pace and speed in the unit of mile, and km. If you enter pace or speed in a following box, and you click calculate button, then it convert to another. minutes seconds per mile = mph (miles per hour) = minutes. Multiply the speed in mph by 1.609344 km per mile. For example, 55 mph is 88.51392 kph. For most practical intents, multiplying by 1.6 is accurate enough. How to Convert KPH to MPH. Convert from kph to mph by dividing the speed in kph by 1.609344. For example, if the the speed limit is 90 kph the equivalent is 55.92 mph. In most cases, dividing by 1.6 is accurate enough. Common Speed. Speed Calculator Online Speed Calculator is online 3 in 1 tool. You can easily calculate average speed having time and distance (given in different units of lenght e.g. miles, yards, meters, kilometers, inches etc.) but you can also compute traveled distance having time and average speed (given in different units of speed mph, kmh, mps yds per second etc.) and you can get travel time having. Unit Descriptions; 1 Mile per Minute: 1 mi/min: 1 Speed of Light in Vacuum: In SI units the speed of light measured in a vacuum is 299,792,458 meters per second
. Kilometers per hour can be abbreviated as km/h, and are also sometimes abbreviated as kph. For example, 1 kilometer per hour can be written as 1 km/h or 1 kph. Kilometers per hour can be expressed using the formula: v km/s = d km t h Read reviews, compare customer ratings, see screenshots, and learn more about Miles Per Hour To Kilometers Per Hour - Speed Converter (mph to km/h). Download Miles Per Hour To Kilometers Per Hour - Speed Converter (mph to km/h) and enjoy it on your iPhone, iPad, and iPod touch
kilometer per hour (km/h) 1.609 344: mile per minute (mi/min) meter per second (m/s) 2.682 24×10 +1: mile per second (mi/s) meter per second (m/s) 1.609 344×10 3: revolution per minute (rpm) (r/min) radian per second (rad/s) 1.047 198×10-1: rpm (revolution per minute) (r/min) radian per second (rad/s) 1.047 198×10-1: Speed (velocity) units conversion chart. Sorted from slow to fast . Name. This on the web one-way conversion tool converts speed and velocity units from kilometers per hour ( km/h ) into miles per second ( mps ) instantly online. 1 kilometer per hour ( km/h ) = 0.00017 miles per second ( mps ). How many miles per second ( mps ) are in 1 kilometer per hour ( 1 km/h )? How much of speed and velocity from kilometers per hour to miles per second, km/h to mps Conversion of units between 1 Mile Per Hour and Mach Number (1 mph and M) is the conversion between different units of measurement, in this case it's 1 Mile Per Hour and Mach Number, for the same quantity, typically through multiplicative conversion factors (mph and M)
How to recalculate 30 miles per hour to km per hour? What is the formula to convert from 30 mph/h to km/h? Miles/hour to Kilometers/hour formula: [Km] = Miles x 1.61 The final formula to convert 30 MPH to KMH is: [KMH] = 30 x 1.61 = 48.3. The earth is in motion. It revolves around itself and around the sun. The universe also is moving around the sun and the universe is also in orbit. Hence the. 1 Knot = 1 Nautical Mile per hour 1 Nautical mile = 6076.12 ft. = 1852 m ** 1 Statute mile = 1760 yards = 5280 feet ** Definition: [n] a unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meter Miles per hour. Mile per hour is a unit of speed defined in the Imperial and US customary systems of units. It measures the number of miles an object travels within an hour. International mile [mi] is a unit of length, equal to 5280 feet and precisely defined as 1609.344 meters. The symbol more commonly used on signs and labels is the. With an average of 282.9 mph (455.2 km/h), the Tuatara is faster than the Agera RS, in which Koenigsegg factory driver Niklas Lilja established an average speed of two runs of 277.87 mph (447.19.
To do this, we need the following relationships: 1000 meter = 1 kilometer 1 kilometers = 0.621 mile 60 seconds = 1 minute 60 minutes = 1 hour We can now set up the equation using these relationships so the units cancel out leaving only the desired miles/hour. speed MPH = 2.998 x 10 8 m/sec x (1 km/1000 m) x (0.621 mi/1 km) x (60 sec/1 min) x (60 min/1 hr) Note all the units cancelled out. average speed in km/h. 6. Rebecca cycles 20 miles on her bike in 2 hours and 30 minutes. Calculate her average speed in mph. 7. Julie can type 50 words in 2 minutes. Debbie can type 300 words in 15 minutes. Calculate the typing speed of each of the girls in: (a) words per minute, (b) words per hour. 8. Fatima, Emma and Andy each drive from London to Brighton, a distance of 60 miles. Fatima. miles per hour. Definition of miles per hour unit: ≡ 1 mi / 3600 s = 1609.344 m / 3600 s. In American public life, this is the most commonly used speed unit. Cars speeds are measured in mpg. Interpretation: The speed at which the body moves 1 mile (or 1609.344 metres) in 1 hour
The speed calculation formula: Speed = Distance / Time. The speed unit in SI system is meters per second (mps). Other common units are miles per hour (mph) and kilometers per hour (kph). To convert only the common speed units, please visit speed converter page Convert a speed to various different measurement units, such as metric, imprerial (US) and astronomical ones as well as historical and archaic units. View key info for any supported speed unit. Explore characteristic speeds from nature, construction etc. and convert them to any other unit
10 km running in 43 min 30 sec. 43.5 min/10 km= 4.35 min per km What is the average time per mile 5 miles = 8 kilo meters 10 km * 5/8 = 25/4 = 6.25 mile 43.5 min/6.25 =6.97 min per mile Average speed in miles per hour. 60/6.97 * 1= 8.61 miles per. You can easily convert measurements by using the conversion tool or by calculating it yourself. Below, we will go over the conversion rate between ft/s, mi/h, and km/h. Feet per second to miles per hour. One foot per second = 0.681818 miles per hour. Example. Let's say your distance is five feet. You can find your total by using this equation Per Kilometer (Mile) of the Transmission. changing from bias ply tires to radial tires, and. Output Shaft. vice versa. Also, changing to low profile radial. tires could affect the tire revolution variable. This. result may change the actual vehicle speed which. A. The correct revolutions per kilometer (mile) of. could result in performance complaints or fuel. the transmission output shaft must. The rider's frontal area is evaluated approximately from the rider's body height and weight, and a parameter which depends on the selected kind of bicycle ().These assumptions yield good matches with frontal area measurements, and with measurements done with SRM Power Measuring cranks.Inside the fully streamlined bicycles, of course, the rider's frontal area is assumed to have no influence
100 km/h = 62.1 mph = 54 knots; Speed Converter. kph to mph: convert km/h to mph and knots. speed converter: convert km/h, mph, knots, m/min, ft/min, m/s or ft/s. Length Unit Converters. Height conversio From Miles per Hour to Kilometers per Hour. To convert your speed the other way around from miles per hour to kilometers per hour enter your miles per hour value into the box labeled Miles per hour and click on Convert to km/h!, the kilometers per hour will be calculated and show up in the box to the rigth labeled Kilometers per hou Kilometers Per Hour The kilometer per hour is a unit of speed, expressing the number of kilometres travelled in one hour. The unit symbol is km/h. Worldwide, it is the most commonly used unit of speed on road signs and car speedometers. Wikipedia page of kilometers per hour Miles Per Hour Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed.
Using the formula for finding distance we can determine Usian Bolt's average speed, or rate, when he broke the world record in 2009 in the 100m. Watch Meters per second is a rate of speed, similar to miles per hour. Finding the speed is easy if you are given the distance in meters and the time in seconds. You can use the formula = to find the rate. You can also determine speed by interpreting a distance-time graph. Sometimes, however, you will be given a rate of speed in other units, such as. A raindrop falls at a rate of 9.3 meters per second (m/s). Use the following facts to convert this speed to kilometers per hour (km/h). 1 km = 1000 m 1 min = 60 sec 1 hour = 60 min Round your answer to the nearest tenth. Solution: 9.3 meters per second (m/s) = 9.3*60*60/1000 = 33.5 km/ Sometimes when you are driving it could be interesting to know how much sooner you will reach your destination if you would just speed up a bit, or if you lower your speed how much later you will arrive. This calculation will calculate how many minutes you save per hour and mile if you increase your speed. The calculation will also calculate.
The derived units for speed are kilometer-per-hour , meter-per-second and so on. Feet, inches, and miles are widely used in USA as units of distance and length. Internal inter-relation between feet and inches is 1 ft = 12 in. The derived units for speed are miles-per-hour , miles-per-second and so on. It happens often (or sometimes) that you have to convert measures from one unit system to the. Conversion Kilometer per hour to Mile per hour (kmph to mph). The kilometer per hour is a unit of speed, expressing the number of kilometers travelled in one hour. The unit symbol is km/h or km. h-1. This tool converts kilometers per hour to miles per hour (kmph to mph) or (km/h to mph) and vice versa. 1 kilometer per hour = 0.62137 miles per hour. The user must fill one of the two fields and. Mile/Hour : Miles per hour is an imperial unit for speed which defined as the number of statute miles covered in one hour. Currently, mile per hour is the standard unit used for speed limits, and generally to express speeds on roads in the UK and the USA. 1 mile per hour = 0.44704 m/s The minutes per mile to minutes per kilometer calculator exactly as you see it above is 100% free for you to use. If you want to customize the colors, size, and more to better fit your site, then pricing starts at just $29.99 for a one time purchase. Click the Customize button above to learn more
C-Sharp-Samples-for-Beginners / Write a C# Sharp program that takes distance and time as input and display the speed in kilometers per hour and miles per hour.cs / Jump to. Code definitions. Logic4 Module Program Class Main Method. Code navigation index up-to-date Go to file Go to file T; Go to line L; Go to definition R; Copy path Cannot retrieve contributors at this time. 29 lines (27 sloc. Over 25,000 miles I'm averaging 249 watt-hours per mile. I live at 7520 feet elevation in Colorado and winter temps get to 0. I stay below the speed limit, anticipate and slow down for traffic lights and roll through stop signs when safe. I use the don't walk sign to telegraph when I'm going to miss the light, then slow to 15-25 so I can maintain some momentum for when the light turns green.
speed of light to miles per minute conversion. Conversion number between speed of light [c] and miles per minute [mpm] is 11176943.823073.This means, that speed of light is bigger unit than miles per minute Convert speed How to convert a speed ? Enter a value then select the speed units (from & to Example : kmph to mph) You can choose the significant digits . Temperature Volume Distance Data Byte CONVERT. Kilometer per hour kmph. Meter per second mps. Miles per hour mph. Knot knot. Mac ma. Kilometer per hour kmph. Meter per second mps. Miles per hour mph. Knot knot. Mac ma. Mass Area Speed Time. Bike riding speeds vary widely depending on your riding conditions. When you are zooming down a paved hill, your speed may increase to over 20 mph, while you may slow to only a few miles per hour when you are climbing a steep or rocky grade. Understanding what the average bike riding speed is may be useful if you are trying to train yourself to.
How many steps there are in a mile depends on your height and walking speed, but is usually between 2,000 and 2,500 steps. The commonly held 2,000 step number is actually low for most people, which can make planning to hit 10,000 steps per day or other daily walking goals seem harder than they actually are. Fortunately, calculating how many steps there are when you walk a mile is easy based on. I like to have them calculate their average speed in their events in miles per hour (and, just because I'm a jerk, in furlongs per fortnight). I thought some of the athletes on here might be interested in knowing their speed in miles per hour so I'll give you an easy formula. (Distance of race/time in seconds)*2.237 gives you speed in miles per hour. So if you run a 100 meter dash in 12. Time, Speed and Distance Calculator; find the time, speed or distance in our classic calculator. Many options, many designations Convert Kilometers Per Hour to Miles Per Hour (km/h in mi/h). Kilometers Per Hour and Miles Per Hour both are the units of SPEED. See the charts and tables conversion here! Home Unit Conversion Sci Calculator ☰ Please support this site by disabling or whitelisting the Adblock for justintools.com. I've spent over 10 trillion microseconds (and counting), on this project. This site is my. Mile/Hour : Miles per hour is an imperial unit for speed which defined as the number of statute miles covered in one hour. Currently, mile per hour is the standard unit used for speed limits, and generally to express speeds on roads in the UK and the USA. 1 mile per hour = 0.44704 m/s. Kilometer/Hour : Kilometres per hour (also spelling: kilometer per hour) is a unit of speed, defined as the.
. To calculate speed in mph, you must have your distance in miles and time in hours. Formula to calculate mph Calories Burned Per Mile at a Pace of 2.5 to 3.5 mph (Flat Surface) Moderate walking speed is 2.5 to 3.5 miles per hour and can take about 17 to 24 minutes per hour, or 10 to 14 minutes per kilometer. This is a good speed to get the heart pumping and lose weight. The following table shows how many calories you burn per mile based on weight and.
1 kilometer per hour (kph) = 0.277777778 meters per second (m/s) = 0.621371192 miles per hour (mph) = 0.911344415 foot / second (ft/s) = 0.539956803 knots (kn, kt or kts).Mach number (Ma or M) is the speed of an object moving in air, divided by the speed of sound at that particular conditions, including temperature and pressure.At Standard Sea Level and temperature 15 degrees Celsius, the. Speed = Distance/time = 15/2 = 7.5 miles per hour. Example 3. A car takes 4 hours to cover a distance, if it travels at a speed of 40 mph. What should be its speed to cover the same distance in 1.5 hours? Solution. Distance covered = 4*40 = 160 miles. Speed required to cover the same distance in 1.5 hours = 160/1.5 = 106.66 mp Boat Speed Conversion. Canada posts speed limits in kph or km/hr for kilometres per hour (ki'-low-mee-trz). Statute miles per hour (mph) is used in cars and powerboats.Knots (kts) is nautical miles (nm) per hour, used by sailboats and ships.(TIP: Divide km/hr in half to get an approximate speed in knots. Speed limits throughout most of the world are set in kilometres per hour (km∕h). The UK remains the only country in Europe, and the Commonwealth, that still defines speed limits in miles per hour (mph). Speed limits in kilometres per hour (km∕h) would provide Traffic Authorities with a more versatile range of speed restrictions an 65 * 1.609344 = 104.60736 km/h On the return trip the average speed was y miles per hour. The average speed for the round trip was 50 miles per hour. Show that . Calculus - Related Rates. A road perpendicular to a highway leads to a farmhouse located 5 miles away. An automobile traveling on the highway passes through this intersection at a speed of 65mph. How fast is the distance between.