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19 April, 12:55

A mountain bike tire completes 20 revoultions and travels 136 feet. round to the nearest inch, what is the diameter of the bikes tire? use 3.14 for pi

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  1. 19 April, 15:32
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    To the nearest inch, the diameter of the tire is 26 inches.

    The bike traveled 136 feet in 20 revolutions. First we want to convert this to inches.

    136 ft * 12 in/ft = 1632 inches.

    Next we find how many inches it travels in 1 revolution:

    1632/20 = 81.6 inches

    The distance around the tire is called the circumference, and the formula for circumference is

    C=πd

    Our circumference is 81.6 and π is 3.14:

    81.6 = 3.14d

    Divide both sides by 3.14:

    81.6/3.14 = 3.14d/3.14

    26 = d
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