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If the area of a sector of a circle boun...

If the area of a sector of a circle bounded by an arc of length `5pi` cm is equal to `20pi\ c m^2` , then the radius of the circle is (a) 12 cm (b) 16 cm (c) 8 cm (d) 10 cm

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If the area of a sector of a circle bounded by an arc of length 5pi cm is equal to 20pi\ c m^2 , then its radius is (a) 12 cm (b) 16 cm (c) 8 cm (d) 10 cm

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