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Question

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


A
2πr2
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B
πr2
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C
3πr2
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D
4πr2
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Solution

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 $$2\pi {{r}^{2}}+\pi {{r}^{2}}=3\pi {{r}^{2}}$$ .


Mathematics

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