Multiple Choice Questions on The radii of two cylinders are in the ratio 3 2 and their curved surface areas are in the ratio 3 5 ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The radii of two cylinders are in the ratio 3 2 and their curved surface areas are in the ratio 3 5 ...........

Quantitative Aptitude ( CCS) Mensuration 3D
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    The radii of two cylinders are in the ratio 3 : 2 and their curved surface areas are in the ratio 3 : 5. What is the ratio of their volumes?

    8 : 11

    Incorrect Answer

    5 : 9

    Incorrect Answer

    7 : 4

    Incorrect Answer

    9 : 10

    Correct Answer
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    Explanation:

    r1/r2 = 3/2 or r1 = 3/2 * r2
    CSA1/CSA2 = 2πr1h1/2πr2h2 = 3/5
    So h1/h2 = 2/5
    Volume1/ Volume2 = πr12h1/ πr22h2 = 9/10

    By: Amit Kumar
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