Question

The circumference of a circle is 39.6cm.find its area.

Answer 1

Answer:

area=124.74

Step-by-step explanation:

Given:

circumference = 39.6

To find :

area of circle

radius =?

Pre-requisite knowledge :

circumference: The perimeter of the circle is known as circumference

.Its formula is 2*pi*r

Area: Area is a measure of how much space there is on a flat surface.

formula is pi*r^2

Solution:

(take pi as $\frac{22}{7}$

=> 2*22/7*r = 39.6

or, 44/7*r =39.6

or, r= 39.6*7/44

or, r= 277.2/44

or,$\boxed{ r= 6.3}$

To find area ;

=>22/7(6.3)(6.3)

or, 873.18/7

= 124.74

$\boxed<strong>{area=124.74}$

Answer 2

Area of circle is 124.74 square cm.