Question

Find the area of a circle whose diameter is $28cm$

Answer 1

Given, Diameter of a circle $=28cm$
Radius of a circle $r=\frac{d}{2}=\frac{28}{2}=14cm$
Then,
Area of the circle $=\pi r^2$ sq units
$=\frac{22}{7}\times 14\times 14$
$=22\times 2\times 14$
$=616c{m}^2$