Question

In fig. OACB is a quadrant of circle with center O and radius 3.5 cm. If OD = 2 cm, then area of shaded part will be :

(A) 6.482 cm²

(B) 5.485 cm²

(C) 4.485 cm²

(D) 3.485 cm²

Answer 1

Answer is (A) 6.482 cm²

Area of shaded part = \(\frac { 1 }{ 4 }\)π(R² – r²),

(where R = outer radius, r = Inner radius)