Moment of inertia

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From a circular disc of radius R and mass 9M, a small disc of radius R/3 is removed. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through O is:
(a)4MR²
(b)40MR²/9
(c)10MR²
(d)37MR²/9
(circular portion removed touches the circumference of the bigger disc)

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Moment of inertia

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