A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20m x 15m x 6m. For how many days will the water of this tank last?
Dimension of tank = 20m x 15m x 6m
l = 20 m , b = 15 m and h = 6 m
Capacity of the tank = lbh m3
= (20 x 15 x 6) m3
= 1800 m3
Water requirement per person per day =150 litres
Water required for 4000 person per day = (4000 x 150) l
= (4000 x 150) / 1000
= 600 m3
Number of days the water will last = Capacity of tank Total water required per day
=(1800/600) = 3
The water will last for 3 days.
