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10 March, 14:10

How many revolutions will a car wheel of diameter 18 in. make as the car travels a distance of one mile? (Round your answer to the nearest whole number.) Incorrect: Your answer is incorrect. revolutions

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  1. 10 March, 16:08
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    The circumference of a circle is (pi) x (the diameter).

    If the diameter of the wheel is 18 inches (1.5 feet), then its circumference is

    (pi) x (1.5 feet) = 1.5π feet.

    Every time the wheel rotates once, the car moves 1.5π feet.

    1 mile = 5,280 feet

    In order for the car to move 5,280 feet, the wheel has to rotate

    (5,280 / 1.5π) times.

    (5,280 / 1.5π) = 1,120.4508 times

    Rounded to the nearest whole number: 1,120 revolutions
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