Question

If a hemispherical dome has an inner radius of 21 cm, then its volume (in $m^3)$ is:

• A. $0.04910m^3$
• B. $0.018354m^3$
• C. $0.019404m^3$
• D. None of these

Answer 1

The correct option is C $0.019404m^3$

Volume of hemisphere $=\frac{2}{3}\pi r^3$
$=\frac{2}{3}\times \frac{22}{7}\times (21/100{)}^3=0.019404m^3$