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  1. A cylindrical bar of 20 mm diameter and 1 m length is subjected to a tensile test. Its longitudinal strain is 4 times that of its lateral strain. If the modulus of elasticity is 2 x 105 N/mm2, then its modulus of rigidity will be

    2. A.
    8 x 106 N/mm2
    B.
    8 x 105 N/mm2
    C.
    0.8 x lO4 N/mm2
    D.
    0.8 x 105 N/mm2

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    Answer : Option D

    Explanation :

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