Question

What is the total surface area of a closed hemisphere?

• A. 4$\pi$$r^2$
• B. 2$\pi$$r^2$
• C. $\frac{4}{3}$$\pi$$r^2$
• D. 3$\pi$$r^2$

Answer 1

The correct option is D

3$\pi$$r^2$

Total surface area of a closed hemisphere
= the curved surface area of the hemisphere + the circular base area
$=2\pi r^2+\pi r^2=3\pi r^2$