From a uniform square plate of side \( a \) and mass \( m \), a \( ...

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From a uniform square plate of side \( a \) and mass \( m \), a
\( \mathrm{P} \)
square portion \( D E F G \) of side \( \frac{a}{2} \) is removed. Then,
W
the moment of inertia of remaining portion about the axis \( A B \) is
(1) \( \frac{7 m a^{2}}{16} \)
(2) \( \frac{3 m a^{2}}{16} \)
(3) \( \frac{3 m a^{2}}{4} \)
(4) \( \frac{9 m a^{2}}{16} \)
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