Question

The circumference of a circle is $396$ cm. Find its area.

Answer 1

circumference of a circle$=2\pi r=396cm$

$r=\frac{396}{2\pi }$

Area of the circle$=\pi r^2=\pi \times \frac{396}{2\pi }\times \frac{396}{2\pi }$

$=198\times \frac{198}{\frac{22}{7}}$

$=198\times 198\times \frac{7}{22}=12,474$ sq.cm