A village havinga population of 4000requires 150liters of water per head per day. It has a tank measuring 20m×15m×6m. The water of this tank will last for how many days
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Population of village = 4000
water per head = 150 L
Total water for
one day = 4000 × 150
= 600000L
Quantity of tank = 20 ×15×6
= 1800m³
= 1800000L
Days last = 1800000÷600000
= 3 days
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