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SSC Quantitative Aptitude Mensuration Question Bank Mensuration-II (II)

  • question_answer
    The ratio of radii of two right circular cylinders is 2 : 3 and their heights are in the ratio 5:4. The ratio of their curved surface area is

    A) 5 : 6

    B) 3 : 4

    C) 4 : 5

    D) 2 : 3

    Correct Answer: A

    Solution :

    [a] Let radii of first and second cylinders be 2r and 3r, respectively and their heights be 5h and 4h, respectively. Then, ratio of their curved surface area \[=2\pi \,(2r)\times 5h:2\pi \,(3r)\times 4h\] \[=10:12=5:6\]


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