Question

Find the area of the shaded design of Figure, where ABCD is a square of side 10 cm and semicircles are drawn with each side of the square as diameter. (Use π = 3.14)

Answer 1

Let us mark the four unshaded regions as I, II, III and IV (Fig.). 

Area of I + Area of III
= Area of ABCD – Areas of two semicircles of radius 5 cm each