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6 January, 12:23

A circular pen has an area of 64Pi square yards. what is the circumfrence of the pen?

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  1. 6 January, 14:34
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    area = pi*r^2

    64pi = pi * r^2

    64 = r^2

    r = 8

    C = 2 * pi * r

    C = 2 * pi * 8

    C = 16 pi

    C @ 50.27 sq yd
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