Question

Find the area of a circle with radius $7cm$.

Answer 1

Compute the area:

Area of a circle with radius $r$ is given as $\mathrm{\pi }\times {\mathrm{r}}^2$.

Given that $r=7cm$

By the formula,

Area $=\mathrm{\pi }\times 7^2$

$\Rightarrow$ Area$=\frac{22}{7}\times 7\times 7\left[\because \mathrm{\pi }\approx \frac{22}{7}\right]$

$\Rightarrow$ Area$=22\times 7$

$\Rightarrow$Area $=154{Cm}^2$

Hence, area of a circle with radius $7Cm$is $154{Cm}^2$.