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A uniform circular disc of radius ‘R’ and mass ‘M’ is rotating about an axis perpendicular to its plane and passing through its centre. A small circular part of radius R/2 is removed from the original disc as shown in the figure. Find the moment of inertia of the remaining part of the original disc about the axis as given above.

1. 2 MR 32 7
2. 2 MR 32 9
3. 2 MR 32 17
4. 2 MR 32 13

Correct answer: 2 MR 32 13

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