Question

If the total surface area of a hemisphere is 27π square cm, then the radius of the base of the hemisphere is?

Answer 1

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Answer 2

$Let \: radius \:of \: a\: Hemisphere = r \:cm$

$Total \: surface \:area = 27\pi \:(given)$

$\implies \pink { 3\pi r^{2}} = 27 \pi$

$\implies r^{2} = \frac{ 27 \pi }{ 3 \pi }$

$\implies r^{2} = 9$

$\implies r =\sqrt{3^{2}}$

$\implies r = 3 \: cm$

Therefore.,

$\red{Radius \:of \: a\: Hemisphere}\green{= 3 \: cm}$

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