Subject :IMO Class : Class 8

DIRECTION : In the given diagram (not drawn to scale), the ratio of the area of circle A to the area of its hidden part is 5 : 2. The area of triangle B is twice as much as the area of circle A.

What is the area of the hidden part of circle A?

(A) 10 cm^{2}

(B) 12 cm^{2}

(C) 14 cm^{2}

(D) 16 cm^{2}

Area of A is 5/7 of 42