Question

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

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

Answer 1

Answer: (C)

Curved surface area of sphere $=4\pi r^2$.
Here, $r=2cm$.
$\therefore$ Curved surface area of sphere $=4\pi (2{)}^2=16\pi c{m}^2$.
Therefore, option $D$ is correct.