Surface Areas and Volumes · Class 9 · CBSE Mathematics

What is the total surface area of a solid hemisphere of radius r?

Practice question from Surface Areas and Volumes (Class 9 · CBSE Mathematics), with the correct answer and a step-by-step solution.

easy · MCQ · Q-7E2DBD

What is the total surface area of a solid hemisphere of radius $r$ ?

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

Solution

The total surface area of a solid hemisphere consists of the curved surface area ( $2\pi r^2$ ) plus the area of the circular base ( $\pi r^2$ ), which totals $3\pi r^2$ .

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