Question

Find the volume of a hemisphere of radius $6.3cm$ ($\pi =22/7$)

• A. $523.9c{m}^3$
• B. $520.91c{m}^3$
• C. $512.91c{m}^3$
• D. $510.91c{m}^3$

Answer 1

The correct option is A $523.9c{m}^3$

$\Rightarrow$ Volume of a hemisphere $=\frac{2}{3}\pi r^3$

$=\frac{2}{3}\times \frac{22}{7}\times (6.3{)}^3$

$=\frac{2}{3}\times \frac{22}{7}\times 6.3\times 6.3\times 6.3$

$=2\times 22\times 2.1\times 0.9\times 6.3$

$=523.9c{m}^3$