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IIT JEE Advanced 2006 Paper 1

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Question : 9

Total: 120

A solid sphere of mass M, radius R and having moment of inertia about an axis passing through the centre of mass as I, is recast into a disc of thickness t, whose moment of inertia about an axis passing through its edge and perpendicular to its plane remains I. Then, radius of the disc will be

2R
√15
R√
2
15
4R
√15
R
4

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