Question

    A right triangle ABC with sides 9 cm ,12cm and 15cm is

    revolved about the side 12 cm. What is the volume of the solid so obtained? (in cm 3 )
    A 343π Correct Answer Incorrect Answer
    B 324π Correct Answer Incorrect Answer
    C 175π Correct Answer Incorrect Answer
    D 225π Correct Answer Incorrect Answer

    Solution

    R = 9cm h= 12cm volume of the cone = 1/3 πr2 h = 1/3 π ×81×12 = 324π cm3

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