A textile mill consumes 5,000 cubic metres of water per day and discharges 0.5% of this as untreated effluent. How many cubic metres of untreated effluent are released each day?
Answer
25 cubic metres
The correct answer is 25 cubic metres — Thus 25 cubic metres of untreated effluent are released daily.
Step-by-step solution
- Convert 0.5% to decimal: 0.005.
- Multiply by daily consumption: 5,000 × 0.005 = 25.
- Thus 25 cubic metres of untreated effluent are released daily.
Common mistake: Misinterpreting percentage as a fraction of 1 instead of 100
Concept tested: Environmental impact measurement in manufacturing
Published · How this solution was prepared and checked
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