Salim provides water to a village, having a population of 4000 which requires 150 litres of water per head per day. He has storage tank measuring 20 m × 15 m × 6 m. For how many days will the water of his tank last? He increased the rate for providing water as the dependence of villagers increased on him. Which value is depicted by Salim?
Solution: (i) Here, the population of the village = 4000 Requirement of water per head per day = 150 litres ∴ Total requirement of water per day = 4000 × 150 litres = 600000 litres Volume of water tank = 20 × 15 × 6 = 1800 m3 = 1800 × 1000 litres Now, number of days for which water of the tank will last = 1800×1000/600000 = 3 days Hence, water tank can serve for 3 days. (ii) Helping the needy.
