Question

What is area of a circle whose diameter is 14 m? $\left(\text{use}\pi =\frac{22}{7}\right)$
sq. m

Answer 1

Given, the diameter of the circle is $14$ m.

We know that, the radius of the circle$\left(r\right)$ is half of its diameter$\left(d\right).$
$r=\frac{d}{2}$
$=\frac{14}{2}$
$=7$ m

The area of the circle is given by
$A=\pi r^2$
$=\pi \times 7^2$
$=\pi \times 49$
$=\frac{22}{7}\times 49(\text{given},\pi =\frac{22}{7})$
$=\frac{22}{7}\times 7\times 7$
$=22\times 7$
$=154$ sq. m

Hence, the area of the given circle is 154 sq. m.