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What will be the position of centre of m...

What will be the position of centre of mass of a half disc shown ?
.

A

`(2a)/(pi)`

B

`(4a)/(3pi)`

C

`(a)/(pi)`

D

`(2a)/(3pi)`

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Fact that C.O.M. of hait disk is at distance of `(4a)/(3pi)` from center.
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