A village having a population of 4000 requires 150 litres of water

A village having a population of 4000 requires 150 litres of water per head per day. It has a tank measuring 20 m x 15 m x 6 m. The water of this tank will last for

  1. 3 days
  2. 2 days
  3. 4 days
  4. 5 days

Answer

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

The correct option is A.