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Depends on the time, average speed = distance / time

Usain bolts record time is 9.58 seconds, giving an average speed of:

100 / 9.58 = 10.438 metres per second ( 23.349 mph )

>

His maximum speed during the run however, was recorded at 12.22 metres per second ( 27.335 mph )

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Q: What is the average speed of the runner in miles per hour over the 100 M run?
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