Question

Find the area of a circle whose diameter is $1.4m$.

Answer 1

Given, Diameter of a circle $=1.4m$
So, radius of the circle $r=\frac{1.4}{2}m=0.7m$

Then,
Area of the circle $=\pi r^2$ sq units
$=\frac{22}{7}\times 0.7\times 0.7m^2$
$=22\times 0.1\times 0.7m^2$
$=1.54m^2$

Hence, the area of the circle is $1.54m^2$