Question

While making a mask,Riya removed two circles of radius 7 cm each and a rectangle of length 4 cm and breadth 1 cm from a circular card of radius 42 cm as shown in the adjoining figure.Find the area of the remaining card.​.​

Answer 1

Explanation:

Area of bigger circle = πr^2

=3.14 * 42*42 = 5538.96

Area of two smaller circle = 2 * 3.14 * 7* 7 = 307.72

Area of rectangle = 4*1 = 4

Required area = 5538.96-311.72 = 5227.24