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Two identical spherical balls of mass M and radius R each are stuck on two ends of a rod of length 2R and mass M (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is : R R 2R

1. 15 17 MR 2
2. 15 137 MR 2
3. 15 209 MR 2
4. 15 152 MR 2

Correct answer: 15 17 MR 2

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