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The moment of inertia of a circular ring...

The moment of inertia of a circular ring about an axis passing through is diameter is I. This ring is cut then unfolded into a uniform straight rod. The moment of inertia of the rod about an axis perpendicular to its length passing through one of its ends is

A

`(4 pi^2I)/3`

B

`(8pi^2I)/3`

C

`(16 pi^2I)/3`

D

`(2pi^2I)/3`

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