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  1. A round steel bar of overall length 40 cm consists of two equal portions of 29 cm each having diameters of 10 cm and 8 cm respectively. If the rod is subjected to a tensile load of 10 tones, the elongation will be given by :(E = 2 x 106 kg/cm2)

    2. A.
    1/10π (1/25 + 1/16) cm
    B.
    2/10π (1/25 + 1/16) cm
    C.
    3/10 π (1/25 + 1/16) cm
    D.
    4/10 π (1/25 + 1/16) cm

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    Answer : Option A

    Explanation :

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