A sprinter set a record, running 200.0m in 21.3s . What is the average speed of the sprinter in km/hour?

Question

A sprinter set a record, running 200.0m in 21.3s . What is the average speed of the sprinter in km/hour?

Answer 1

The distance the sprinter ran is given in meters and the time is given in seconds. Convert meters to kilometers and seconds to hours and divide the distance by the time to calculate the average speed.

Answer 2

200.0 m = 0.2000 km (200.0 m / 1000 m/km = 0.2000 km)

21.3 s = 0.0059167 hr (21.3 s / (60 s/min x 60 min/hr = 0.0059167 hr)

0.2000 km / 0.0059167 = 33.8 km/hr