Question

A village having a population of 4000 requires 150 litres of water per head per day. It has a tank measuring $20m\times 15m\times 6m.$ For how many days will the water of this tank last?

Answer 1

$\text{Population of a village}=4000$

$\text{Water required per head per day}=150litres$

$\therefore \text{Total water required daily}=4000\times 150litres$

$=600000litres$

$\text{Dimensions of a tank}=20m\times 15m\times 6m$

$\therefore \text{Volume of tank}=20\times 15\times 6m^3$

$=1800m^3$

$\text{Capacity of water in litres}=1800\times 1000litres$ $(\because 1m^3=1000litres)$

$=1800000litres$

$\text{The water will last for}=\frac{1800000}{600000}=3days$