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Seven indentical circular planar discs, ...

Seven indentical circular planar discs, each of mass M and radius R are welded symmetrically as shown, The moment of inertia of the arragement about the axis normal to the plane and passing through the point P is

A

`(73)/(2) MR^(2)`

B

`(181)/(2) MR^(2)`

C

`(19)/(2) MR^(2)`

D

`(55)/(2) MR^(2)`

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