19 yards in 2.5 seconds equals how many mph?

Answer 1

speed = distance / time

Speed(mph) = (19/1760) / ( 2.5/3600)

Division of fractions.

speed = 19/1760 X 3600/22.5

Cancel dowm by '10'

speed(mph) = 19/176 X 360/2.5

Cancel down by '2'

speed = 19/88 x 180/2.5

Cancel down again by '2'

speed = 19/44 x 90/2.5

And again

speed = 19/22 x 45/2.5

Convert the 2.5 to a fraction 2.5 = 2 1/2 = 5/2

speed = 19/22 X 45 / ( 5/2) becomes

speed = 19/22 X 90/5

Cancel down by '5'

Speed = 19/22 X 18/1

Cancel down by '2'

Speed (mph) = 19/11 X 9/1

Multiply out

Speed = 171/11 = 15 6/11 mph or 15.545454.... mph.

NB Yes I have made 'heavy weather' of it , but it is done to show methods of calculation, without using a calculator.

NNB To compare the faster 100 metre runners in under 10 secs, are only speeding at about 23 mph.

Answer 2

To convert yards per second to miles per hour, first convert yards to miles and seconds to hours. There are 1760 yards in a mile and 3600 seconds in an hour. Therefore, 19 yards in 2.5 seconds is equal to approximately 44.6 miles per hour.

Answer 3

19 yards in 2.5 seconds equals a pace of 15.54 miles per hour.