Question

Find the curved surface area of a hemisphere whose radius is $7cm$.

• A. $308c{m}^2$
• B. $318c{m}^2$
• C. $388c{m}^2$
• D. $368c{m}^2$

Answer 1

The correct option is A $308c{m}^2$

We know, radius r $=7cm$
Curved surface area of hemisphere $=2\pi r^2$
$=2\times \frac{22}{7}\times 7\times 7$
$=308c{m}^2$