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    Question

    If the height of a cylinder is made four times and

    radius is decreased by 60%, then what is the percentage change in its volume?
    A 50% Correct Answer Incorrect Answer
    B 45% Correct Answer Incorrect Answer
    C 68% Correct Answer Incorrect Answer
    D 32% Correct Answer Incorrect Answer

    Solution

    ATQ, Volume of cylinder = πr²h Height = 1 : 4 Radius = 5 : 2 Ratio = 25 : 8 Change = 8 × 100 / 25 = 32% 100 – 32 = 68%

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