How many miles per hour is running 100 yards in 9.7 sec?

Answer 1

To do this you need to know:

60 second in a minute

60 minutes in an hour

1760 yards in one mile

Now first work out how far one would travel running at that speed in one minute, by finding how far you would have traveled in one second-

100/9.7 = 10.30927835051546 yards /second

Then multiply by 60 to get distance traveled in one minute =

10.30927835051546 * 60 = 618.5567010309278 yards / minute.

Now multiply by 60 again to get the distance traveled in an hour

618.5567010309278*60=37113.40206185567 yards / hour

OK we now know that we would be running at a speed of 37113.40206185567 yards an hour. BUT we want the answer in miles an hour, so we have to divide this by the number of yards in a mile:

37113.40206185567/1760=21.09 miles per hour.

Compare this with the related answer for this question where the distance run was in Meters (which are longer than yards - so you would be running faster)