28. Two circular discs A and B are of equal masses and thickness but made of metals with densities
Two circular discs A and B are of equal masses and thickness but made of metals with densities dA and dB (dA>dB) . If their moments of inertia about an axis passing through centres and normal to the circular faces be IA  and IB , then
(a)Â Â IAÂ =Â Â IB
(b)Â Â IAÂ >Â IB
(c)Â Â IAÂ <Â IB
(d)Â Â IA >=< IB
Ans. c
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