Question

Usain Bolt temporarily reached a speed of 27.5 miles/hour in the middle of his 2009 world record breaking 100m sprint! How fast is this in feet/second? (Round

your answer to at least 2 decimal places.)
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Answer 1

40.33

Explanation:

Miles to feet = times by 5280

so 27.5 x 5280 = 145200 feet per hour

145200/hour = 145200/ 60min

145200/60 min = 2420/1min

2420/1min = 2420/60second

2420/60second = 40.33/1second

Answer 2

40.33 feet per second

Explanation:

27.5 x 1.46 (because 1mph = 1.46 feet per second)

= 40.33