Question

The radius of a sphere is $28$ cm. Find its curved surface area. $(\pi =\frac{22}{7})$

Answer 1

Given, radius of the sphere $=28\text{cm}$
Curved surface area of sphere $=4\pi r^2$
$=4\times 3.14\times (28{)}^2$
$=4\times 3.14\times 784$
$=9847.04{\text{cm}}^2$