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30 September, 14:06

The radius of a bicycle wheel is 25.5cm. How many complete revolutions must it take to cover a distance of at least 800m?

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  1. 30 September, 14:21
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    500 revolutions.

    Step-by-step explanation:

    The circumference of the wheel is 2 π r

    = 2 * π * 25.5

    = 51π cm.

    800 m = 80000 cm. so

    Number of revolutions = 80000 / 51π

    = 499.3.

    So to cover the 800 m the wheel must do at least 500 revolutions.
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