A small village has 5 barrels, each can hold 6 litres. It rains for 7 days, and each barrel is filled every day. How many litres of water can the villagers collect in total? Also, explain how this water eventually returns to the sea through the water cycle in brief.
Answer
210 litres; water evaporates, forms clouds, falls as rain again and drains into rivers and oceans.
The correct answer is 210 litres; water evaporates, forms clouds, falls as rain again and drains into rivers and oceans. — Answer: 210 litres; water evaporates, forms clouds, falls as rain again and drains into rivers and oceans.
Step-by-step solution
- Calculate volume per day per barrel: 6 litres.
- Multiply by number of barrels: 6 × 5 = 30 litres per day.
- Multiply by number of days: 30 × 7 = 210 litres.
- State that the collected water evaporates into the atmosphere.
- Explain that evaporation forms water vapour, which condenses into clouds.
- Describe how the clouds release rain, which replenishes rivers and eventually reaches the sea, completing the cycle.
- Answer: 210 litres; water evaporates, forms clouds, falls as rain again and drains into rivers and oceans.
Common mistake: Omitting the evaporation step
Concept tested: Water cycle
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