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    Question

    A sphere has a volume of 121.5Ï€ cm3. Find

    its radius.
    A 2.5 cm Correct Answer Incorrect Answer
    B 9 cm Correct Answer Incorrect Answer
    C 4.5 cm Correct Answer Incorrect Answer
    D 5 cm Correct Answer Incorrect Answer

    Solution

    Let the radius of the sphere be 'r' cm. Volume of sphere = (4/3) X π X r3 So, 121.5π = (4/3) X π X r3 Or, (729/8) = r3 So, r = (9/2) = 4.5

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