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  1. A close-coiled helical spring has 100 mm mean diameter and is mada of 20 turns to 10 mm diameter steel wire. The spring carries an axial load of 100 N Modulus of rigidity is 84 GPa. The shearing stress developed in the spring in N/mm2 is

    2. A.
    120/π
    B.
    160/π
    C.
    100/π
    D.
    80/π

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    Answer : Option D

    Explanation :

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