Question

Find the area of the circle whose circumference is:
$396cm$

Answer 1

As we know that,

Circumference of circle $=2\pi r=396cm\left(\text{Given}\right)$

$\Rightarrow r=\frac{396\times 7}{22\times 2}=9\times 7=63cm$

Thererfore,

Area of circle $=\pi r^2=\frac{22}{7}\times 63\times 63=12474{cm}^2$