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Q: 100-meter dash in 10.49 seconds to miles per hour?

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A 10.49-second 100-meter dash equates to an average speed of 21.32 miles per hour.

Running a 40-yard dash in 4.2 seconds equates to a pace of 19.48 miles per hour.

(100 meters/16 seconds) x (3,600 seconds/hour) x (1 mile/1,609.344 meters) = 13.981 mph(rounded)

100m/40s or 2.5 metres per second.

A mile contains 1760 yards. Therefore, 40 yd/1760(yd/mi) = 0.0227 miles. An hour contains 60 minutes of 60 seconds each. Therefore, 6.5 seconds = 6.5/(60 X 60) = 0.00181 hour. 0.0227 miles/0.00181 = 13 mph, to the justified number of significant digits.

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I do not know. But when i was twelve, I ran a 100meter dash in about 12, 13 seconds. Is that good?

This means an average speed of 22.87 miles per hour over the distance of the race.

3.5 seconds in the 30 yard dash equals 17.53 miles per hour.

The current World Record for the men's 100M Sprint is 9.58 seconds by Usain Bolt of Jamaica. The current World Record for the women's 100M Sprint is 10.49 Seconds by Florence Griffith-Joyner of the USA.

Ben Johnson

A 10.49-second 100-meter dash equates to an average speed of 21.32 miles per hour.

(50 yards/6.6 seconds) x (3,600 seconds/hour) / (1,760 yards/mile) = 15.496 miles per hour (rounded)

You are running 15.5 miles per hour.

Running a 40-yard dash in 4.2 seconds equates to a pace of 19.48 miles per hour.

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