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    Question

    If the height of a cylinder becomes triple and radius

    is decreased by 20%, then what is the percentage change in its volume?
    A 50% Correct Answer Incorrect Answer
    B 92% Correct Answer Incorrect Answer
    C 68% Correct Answer Incorrect Answer
    D 80% Correct Answer Incorrect Answer

    Solution

    ATQ, Volume of cylinder = πr²h Height = 1 : 3 Radius = 5 : 4 Ratio = 25 : 48 Change = 48 × 100 / 25 = 192% Since > 100, increase = 92%

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