Question

If the radius of a sphere is $2cm$, then the curved surface area of the sphere is equal to:

• A. $8\pi {cm}^2$
• B. $16\pi {cm}^2$
• C. $12\pi {cm}^2$
• D. $16\pi {cm}^2$

Answer 1

The correct option is D $16\pi {cm}^2$

We have, $r=2cm$.

We know that the curved surface area of the sphere $=4\pi r^2$.

Therefore, the curved surface area

$=4\pi \times 2^2$

$=16\pi c{m}^2$.

Hence, option $D$ is correct..