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    Question

    If the height of a cylinder is doubled and radius is

    reduced by 75%, then what is the percentage change in its volume?
    A 50% Correct Answer Incorrect Answer
    B 49.5% Correct Answer Incorrect Answer
    C 68% Correct Answer Incorrect Answer
    D 87.5% Correct Answer Incorrect Answer

    Solution

    ATQ, Volume of cylinder = πr²h Height = 1 : 2 Radius = 4 : 1 Ratio = 16 : 2 = 8 : 1 Change = 1 × 100 / 8 = 12.5% 100 – 12.5 = 87.5%

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