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9 February, 13:22

The circumference of a coin is 20π cm what is the radius? what is the diameter?

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  1. 9 February, 15:08
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    Circumference of a coin = 2πr

    Given circumference = 20π cm

    ⇒ 2πr = 20π

    ⇒ r = 10 cm

    Therefore, diameter = 20 cm.
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