From a circular disc of radius R and mass 9M , a small disc of mass M and radius R/3 is removed.....

Q.no. 36 .. From a circular disc of radius R and mass 9M , a small disc of mass M and radius R/3 is removed concentrically . The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through its centre is --
(a) 40/9 MR2
(b) MR2
(c) 4MR2
(d) 4/9 MR2

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