A farmer has 2 hectares of land with average rainfall 700 mm per year. If the water requirement for his crop is 500 mm per hectare, how much water in cubic metres is required for the crop in a year?
Answer
10000
The correct answer is 10000 — Thus 10,000 m³ of water is needed.
Step-by-step solution
- Convert 2 hectares to square metres: (2 \times 10,000 = 20,000) m².
- Convert 500 mm to metres: (500 \text{ mm} = 0.5) m.
- Multiply area by depth: (20,000 \times 0.5 = 10,000) m³.
- Thus 10,000 m³ of water is needed.
Common mistake: Failing to convert hectares to m² or mm to m
Concept tested: Calculation of irrigation water requirement
Published · How this solution was prepared and checked
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