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Questions  

A circular plate of radius  R2 is cut from one edge of thin circular plate of radius R. The moment of inertia of remaining portion about an axis through O perpendclicular to plane of plate is (Where M is the mass of remaining plate)

a
11MR224
b
7MR212
c
13MR224
d
5MR27

detailed solution

Correct option is C

IR=I1−I2I1=MI   of circular solid  plate of radius R about OI2=MI    of circular removed plate of radius R/2 about O

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