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21 kilometres is, as the question states, a distance. Miles per hour is a measure of speed. Speed and distance are two different things and you cannot convert one to the other without additional information.

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Q: What is 21 kilometers distance in miles per hour?
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Related questions

Why are miles per hour and kilometers per hour different speeds of earth?

A mile is not the same distance as a kilometer; therefore miles per hour and kilometers per hour are not the same unit, either.


How fast in miles is 500 miles per kilometer?

This question cannot be answered in its current form. Miles per kilometer is not possible as both miles and kilometers are both distance units. In order to measure speed you must have both a distance unit and a time unit. If the question was meant to be "How fast is 500 kilometers per hour in miles per hour?" then the answer is 310.685596 miles per hour as there is 0.621371192 miles per kilometer or 1.609344 kilometer per mile. Likewise, if you're looking for "How fast is 500 miles per hour in kilometers?" then you will arrive at 804.672 kilometers per hour.


What is 40 kilometers per hour in miles per hour?

40 kilometers per hour is approximately equal to 24.85 miles per hour.


What is 52 miles per hour in kilometers per hour?

52 miles per hour = 83.7 kilometers per hour.


How much is 35 mph in kilometers?

35 mph is equivalent to approximately 56.3 kilometers per hour.


What is 145 kilometers in miles per hour?

145 kilometers per hour is 90.1 miles per hour.


What is 210 kilometers in miles per hour?

210 kilometers per hour is 130 miles per hour.


How do you covert miles per hour to kilometers?

Miles per hour x 1.6093 = kilometers per hour


How much is 200 kilometers in miles per hour?

200 kilometers is about 125 miles, and consequently 200 kilometers per hour is about 125 miles per hour.


Fifty miles per hour equals how many kilometers?

Fifty miles per hour is equal to 80.47 kilometers per hour.


How fast 1600 kilometers per hour to move in miles per hour?

1,600 kilometers per hour is 994.19 miles per hour.


22 miles per hour in kilometers per hour?

22 miles per hour is approximately equivalent to 35.4 kilometers per hour.