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Discussion :: UPSC Civil Service Exam Questions

  1. The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm thick, of material weighing 100 kg/m3, rotating above an axis through its centre at right angles to its place and making 2000 rpm is

    2. A.
    B.
    C.
    2 x 108 π3
    D.
    4 x 108 π3

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    Answer : Option B

    Explanation :

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