Question

Taking $\pi =3.14$, find the radius and circumference of a circle whose area is :
$200.96c{m}^2$

Answer 1

As we know that,

Area of circle $=\pi r^2$

Area of circle $=200.96{cm}^2\left(\text{Given}\right)$

$\therefore \pi r^2=200.96$

$\Rightarrow r^2=\frac{200.96}{3.14}$

$\Rightarrow r=\sqrt{64}=8cm$

Therefore,

Circumference of circle $=2\pi r=2\times 3.14\times 8=50.24cm$