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In the give figure, the sectors of two concentric circles of radii \( 7 \mathrm{~cm} \) and \( 3...
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In the give figure, the sectors of two concentric circles of radii \( 7 \mathrm{~cm} \) and \( 3.5 \mathrm{~cm} \) are shown. Find the area of the shaded region.