Find the volume of a solid hemisphere whose radius is 0.7 m. \(\left(\pi=\frac{22}{7}\right)\)
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 0.7186 m3
A hemisphere is half a sphere, so its volume is half of \(\frac{4}{3}\pi r^3\), that is, \(\frac{2}{3}\pi r^3\).
\(r^3=0.7\times0.7\times0.7=0.343\)
Volume \(\displaystyle =\frac{2}{3}\times\frac{22}{7}\times0.343=\frac{2}{3}\times1.078=0.7186\ldots\) m3