For the same total mass, which of the following will have the large...

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For the same total mass, which of the following will have the largest moment of
\( \mathrm{P} \) inertia about an axis passing through the W centre of gravity and perpendicular to the plane of the body?
(1) A disc of radius a
(2) a ring of radius a
(3) a square lamina of side 2 a
(4) four rods forming square of side \( 2 a \).
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