Question

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

Answer 1

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

$\therefore$Area $=\pi r^2=\frac{22}{7}\times 7\times 7=154c{m}^2$