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15 February, 10:36

It is 70cm long and has a circumference of 40cm what is the radius

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  1. 15 February, 11:46
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    The legnth is irrelivant

    we know that

    Circumference=2 times pi time radius

    c=40

    40=2 times pi times radius

    divide both sides by 2

    20=pi times radius

    divide both sides b pi

    20/pi=radius

    the radius is 20/pi cm or aproximately 6.366199048 cm
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