Question

The radius of a circle is stated as $2.12cm.$ Its area should be written as

Answer 1

It is given that radius of a circle $\left(r\right)=$$2.12cm$

Area of the circle $\left(A\right)={\mathrm{\pi r}}^2$

$=\frac{22}{7}\times {\left(2.12\right)}^2$

$=\frac{22}{7}\times 2.12\times 2.12$

$=3.14\times 2.12\times 2.12$

$=3.14\times 4.4944$

$=14.11c{m}^2$

Hence$,$ the area of the circle is $14.11c{m}^2$