The moment of inertia of a square lamina about the perpendicular axis through its centre of mass...

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The moment of inertia of a square lamina about the perpendicular axis through its centre of mass is \( 20 \mathrm{~kg}-\mathrm{m}^{2} \). Then, its moment of inertia about an axis touching its side and in the plane of the lamina will be :-
(1) \( 10 \mathrm{~kg}-\mathrm{m}^{2} \)
(2) \( 30 \mathrm{~kg}-\mathrm{m}^{2} \)
(3) \( 40 \mathrm{~kg}-\mathrm{m}^{2} \)
(4) \( 25 \mathrm{~kg}-\mathrm{m}^{2} \)
(W)
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