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Question 14AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O (see Fig. 12.32). If ∠AOB=30∘, find the area of the shaded region.

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Question 14

AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O (see Fig. 12.32). If AOB=30, find the area of the shaded region.







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