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2. The ratio of lengths of two rods A and B of same material is 1 : 2 and the ratio of their radii is 2 : 1, then the ratio of modulus of rigidity of A and B will be

(a)   4 : 1                                         (b)   16 : 1

(c)   8 : 1                                         (d)   1 : 1

Answer-d

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