Question : A hemispherical bowl whose radius is 21 cm is full of ice cream. Find the volume of the ice cream. (take $\pi=\frac{22}{7}$)
Option 1: 20000 cm3
Option 2: 21000 cm3
Option 3: 22000 cm3
Option 4: 19404 cm3
Correct Answer: 19404 cm 3
Solution :
A hemispherical bowl whose radius is 21 cm is full of ice cream.
We know that the volume of a hemisphere = $\frac{2}{3}\pi r^3$, where $r$ is the radius
So, the required volume of the ice cream = $\frac{2}{3}×\frac{22}{7}×21×21×21$ = 19404 cm
3
Hence, the correct answer is 19404 cm
3
.
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