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2 September, 17:00

The diameter of each wheel of a bicycle is 28 inches28 inches. if you are traveling at a speed of 40 miles per hour40 miles per hour on this bicycle, through how many revolutions per minute are the wheels turning?

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  1. 2 September, 20:38
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    Convert 10 miles into inches:

    10 miles = 10*5280 = 52800 feet 633600 inches

    (pi) d = (3.14) = 87.92 inches per revolution

    633600/87.92 = 7206.55 revolution per hour

    convert to revolution per min:

    7206.55 rev/hr * 1/160 hr/min

    120.1 revolution per minute
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