The moment of intertia of a disc about a...

The moment of intertia of a disc about an axis passing through its centre and normal to its plane is I. The disc is now folded along a diameter such that the two halves are mutually perpendicular. Its moment of inertia about this diameter will now be

A

I

B

`I/sqrt(2)`

C

`I/2`

D

`I/4`

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The correct Answer is:

C

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