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Seven idential circular planer discs...

Seven idential circular planer discs , each of mass M and radius R are welded symmetrically as shown . The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is
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A

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

B

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

C

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

D

`(55 ) /( 2 ) Mr^(2) `

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