From a uniform disc of radius R and mass 9M, four small discs of radiu – InterviewSolution

1.	From a uniform disc of radius R and mass 9M, four small discs of radius R3 are removed as shown in figure. The moment of inertia of the remaining disc about an axis perpendicular to the plane and passing through the centre of the disc is nMR2. Then, n is
Answer» From a uniform disc of radius $R$ and mass $9 M$ , four small discs of radius $\frac{R}{3}$ are removed as shown in figure. The moment of inertia of the remaining disc about an axis perpendicular to the plane and passing through the centre of the disc is $n M R^{2}$ . Then, $n$ is

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