Q29 of 45 Page 12

In Fig. 6, find the area of the shaded region, enclosed between two concentric circles of radii 7 cm and 14 cm where ∠AOC = 40° (Use π = 22/7)

(CBSE 2016)

Radius of big circle, r1 = 14cm


Radius of small circle, r2 = 7cm


Reflex ∠AOC = reflex ∠BOD = 360 - 40 = 320°


Required Area = area of major sector OAC - area of major sector OBC






= 410.67 cm2

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