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AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O. If ∠AOB=30∘, find the area of the shaded region. |
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Answer» AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O. If ∠AOB=30∘, find the area of the shaded region.
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