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23 July, 11:56

If the radius of a circle is increased by 10 % then prove the volume will increase by 33.1%

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  1. 23 July, 12:01
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    So

    if increase by 10%, that means times 1.1

    sub 1.1r for r in

    V = (4/3) pir³

    so

    nV = (4/3) pir³

    nV = (4/3) pi (1.1r) ³

    nV = (4/3) pi1.331r³

    nv = ((4/3) pir³) 1.331

    V = (4/3) pir³

    nV = (V) 1.331

    x times 1.331 is about a 33% increase
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