Question

A hemispherical vessel of radius 7 m is filled with water. The amount of water in vessel is _____.(approx)
(1000 litres = 1 m${}^3$)

• A. 718670 litres
• B. 71800 litres
• C. 710800 litres
• D. 701800 litres

Answer 1

The correct option is A 718670 litres

Given, radius, $r=7\text{m}$

Volume of hemispherical vessel $=\frac{2}{3}\pi r^3=\frac{2}{3}\times \frac{22}{7}\times 7^3=718.666\cong 718.67{\text{m}}^3$

Given,$1m^3=1000litres$
$\therefore$ Volume of hemispherical vessel (in litres)
$=718.67\times 1000\text{litres}=718670\text{litres}$