Question

Question 5

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet $(Take\pi =3.14)$

Answer 1

Radius of circular sheet (R) = 4 cm and radius of removed circle (r) = 3 cm
Area of remaining sheet = Area of circular sheet - Area of removed circle


Area of remaining sheet
$=\pi R^2-\pi r^2$
$=\pi (R^2-r^2)$
$=\pi (4^2-3^2)$
$=\pi (16-9)$
$=3.14\times 7$
$=21.98c{m}^2$
Thus, the area of remaining sheet is $21.98c{m}^2$