Determine the location of COM of semi-circular \( \mathrm{P} \) rin...

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Determine the location of COM of semi-circular
\( \mathrm{P} \) ring of radius \( R \), from the centre

W
(1) \( 4 R / \pi \)
(2) \( \frac{3 R}{2 \pi} \)
(3) \( 2 R / \pi \)
(4) \( 5 R / 2 \pi \)
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