A solid sphere and a hollow sphere of the same mass have the same M.I. about their respective di...

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A solid sphere and a hollow sphere of the same mass have the same M.I. about their respective diameters. The ratio of their radii will be :-
(1) \( 1: 2 \)
(2) \( \sqrt{3}: \sqrt{5} \)
(3) \( \sqrt{5}: \sqrt{3} \)
(4) \( 5: 4 \)
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