Question

A village having a population of 4000 , requires 150 litres water per head per day . it has tank measuring 20m,15m,6m. how many days for the water is sufficient enough once the tank is made full .

Answer 1

Daily need of water = 4000 x 150

Amount of water in tank = 20 x 15 x 6 x 1000

Number of days = Amount of water / Daily need

= (20 x 15 x 6 x 1000) / (4000 x 150) = 3

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Answer 2

Given :- A population is 4000 it requires 150 litres of water per head per day.

Therefore, Total population of the village per day will consume = 4000×150
= 6,00,000 litres


$1 {m}^{3} = 1000l$
therefore 6,00,000 litres will be


$\frac{600000}{100} = 600 {m}^{3}$
For tank:-

$l \times b \times h = capacity \: of \: the \: tank$
20×15×6=1800m^3

Number of days for which the water of tan k will last =

$\frac{1800}{600 } = 3 \: days$