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67.

A circular disc A of radius r is made from an iron plate of thickness t and another circular disc B of radius 4r is made from an iron plate of thickness t/4. The relation between the moments of inertia IA  and IB is

(a)      IA >IB

(b)     IA = IB

(c)     IA < IB

(d)  Depends on the actual values of t and r

Ans. c

(5)

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