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The moment of inertia of a thin uniform ...

The moment of inertia of a thin uniform rod rotating about the perpendicular axis passing through one end is 'I'. The same rod is bent into a ring and its moment of inertia about the diameter is `I_1`. The ratio `I/I_1` is

A

`(4pi)/3`

B

`(8pi^2)/3`

C

`(5pi)/3`

D

`(8pi^2)/5`

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