Question

The circumference of the circle is $132cm$; find its area.

Answer 1

Step 1:To calculate the radius of circle

Circumference of circle $=2\mathrm{\pi r}$

Radius of circle$=\frac{Circumference}{2\mathrm{\pi }}$

Radius of circle$=\frac{132}{2\times {\displaystyle \frac{22}{7}}}=21cm$

Step 2:To calculate the area of circle

Area of circle$=\mathrm{\pi }{\mathrm{r}}^2$

Area of circle$=\frac{22}{7}\times 21\times 21=1386c{m}^2$

Hence,area of circle is equal to $1386c{m}^2$