Question:
A hemispherical tank has the inner radius of 2.8 m. Find its capacity in liters.
Solution:
Radius of the tank = 2.8 m
Therefore Capacity $=2 / 3 \pi r^{3}$
$=2 / 3 \times 22 / 7 \times(2.8)^{3}=45.994 \mathrm{~m}^{3}$
$1 \mathrm{~m}^{3}=10001$
Therefore capacity in litres = 45994 litres