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    4. Geometry
    5. The radius of a sphere is 12cm. The surface of the sphere is what percent of its volume

    Question

    The radius of a sphere is 12cm. The surface of the

    sphere is what percent of its volume
    A 20% Correct Answer Incorrect Answer
    B 25% Correct Answer Incorrect Answer
    C 15% Correct Answer Incorrect Answer
    D 35% Correct Answer Incorrect Answer

    Solution

    Given r = 12cm Surface area of sphere = 4πr22 Volume of sphere =4/3 πr3 According to question    = (4πr2)/(4/3 πr3 )   ×100   = 3/r×100     = 3/12×100   = 1/4×100   =25%

    Practice Next
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