Question

If a sprinter runs a distance of 100 metres in 9.83 seconds . calculate his average speed in km/h

Answer 1

distance travelled by sprinter = 100 m
Time taken = 9.83 sec

∵speed = distance/time taken
= 100/9.83
= 10.17 m/s

Now we know, 1 km/h = 1000/3600 m/s
so, 1 m/s = 3600/1000 km/h = 18/5 km/h
∴ 10.17 m/s = 10.17 × 18/5 = 10.17 × 18/5 = 36.612 km/h
Hence, average speed = 36.612 km/h

Answer 2

Explanation:

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