Question

The circumference of a circle is $22cm$. Then the area is _______

Answer 1

Let $r$ be the radius of the circle.

Then according to the problem we've,

$2\pi \times r=22$

or, $r=3.5$.

Now area of the circle is $\frac{22}{7}\times \frac{7^2}{2^2}=38.5$ cm${}^2$.