Question

In the given figure, find the area of the unshaded portion within the rectangle. (Take π = 22/7).

Answer 1

In the given figure
Radius of circle = 3 cm
Length of rectangle = 15 cm
Breadth of rectangle = 6 cm

The area of the unshaded portion within the rectangle

= Area of rectangle - [ Area of I + II + `1/2`III ] circles

= 15 x 6 - [ Area of `2 1/2` circles ]

= 90 - `5/2` x πr² 

= 90 - `5/2` x 3.14 x 3²

= 90 - 70.65
= 19.35 cm².