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25 April, 08:29

A sphere has a surface area of 36 pi ft square. find the volume of the sphere

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  1. 25 April, 08:32
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    SA=4pir^2

    V = (4/3) hpir^2

    given

    SA=36pi

    36pi=4pir^2

    divide by 4pi

    9=r^2

    sqrt both sides

    3=r

    v = (4/3) pir^3

    v = (4/3) pi3^3

    V=4pi9

    v=36pi

    36pi cubic feet
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