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26 July, 07:22

A wet bicycle tire leaves a trace of water on the floor. The tire has a radius of 14 inches, and the bicycle wheel makes 3 full rotations before stopping. How long is the trace of water left on the floor?

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  1. 26 July, 08:40
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    Circumference of a circle is c=2πr

    r=14in

    -> c=2*14*π=28π

    3 rotations->trace length=3c=3*28π=84*π inch≈263.89 inch≈22 feet
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