Question

Find the area of a circle whose circumference is 44 cm.

Answer 1

Let $r$ be the radius of the circle.

Now, $2\pi r=44$

$\Rightarrow 2\times \frac{22}{7}r=44$

$\Rightarrow r=7cm$

So, area $=\pi r^2=\frac{22}{7}\times 7^2=154c{m}^2$