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प्रश्न
A small village, having a population of 5000, requires 75 litres of water per head per day. The village has got an overhead tank of measurement 40 m × 25 m × 15 m. For how many days will the water of this tank last?
उत्तर
Given, total population of a small village = 5000
Water required per head per day = 75 L
Volume of water required for a small village per day = 5000 × 75 = 375000 L
= `375000/1000 m^3` ...[∵ 1 m3 = 1000 L]
= 375 m3
Total capacity of water in overhead tank = Volume of overhead tank
= 40 × 25 × 15
= 15000 m3
∴ Number of days = `"Total capacity of water in over speed tank"/"Volume of water required for a small village per day"`
= `15000/375`
= 40 days
Hence, water of this tank will be last in 40 days.
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