Mathematics
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.
For how many days will the water of this tank (when full) will last ?
Mensuration
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Answer
Given:
Total population = 4,000
Water required per person per day = 150 litres
Tank dimensions = 20 m × 15 m × 6 m
Each person needs 150 litres/day:
Total water required per day = 4,000 × 150 = 600,000 litres/day
Tank is a cuboid:
Volume = length × breadth × height
= 20 × 15 × 6 = 1,800 m3
= 1,800 × 1000
= 1,800,000 litres
Volume of tank = Total water per day x Number of days
⇒ Number of days =
= = 3
Hence, the water in the tank will last for 3 days.
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