Question

The total surface area of a solid hemisphere of radius $r$ is given by

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

Answer 1

The correct option is C $3\pi r^2$

Curved surface area of hollow hemisphere $=2\pi r^2$

The area of a circlular base of radius $r$ is $\pi r^2$ .

Total surface area of solid hemisphere $2\pi r^2+\pi r^2=3\pi r^2$ .