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Tyson Gay's best time to run 100.0 meters was 9.69 seconds. What was his average speed during this run, in miles per hour? (3.281ft=1 m)(1 mile=5280 ft)

 Feb 7, 2019
 #1
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First....calculate the number of feet in 100m  =   100 * 3.28 ft   =  328 ft

 

Divide the by the number of seconds   =  328/ 9.69  ≈  33.85 ft /sec

 

Multiply this by the number of seconds in one hour  =   3600 sec * 33.85 ft /sec = 121860 ft

 

Divide this by the number of feet in a mile     (121860 ft / hr)  / (5280 ft / mile) ≈  23.08 mph

 

 

cool cool cool

 Feb 7, 2019

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