The volume of the hemisphere is 23r3
V=2/3×(3.14×1^3 )
=2.09 m^3
Question : Find $\frac{1}{21}$th of the volume of a hemisphere whose radius is 4.2 m.
Question : The volume of a hemisphere is $486 \pi\ \mathrm{cm}^3$. Find the radius.
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