An apparel factory in Surat consumes 4,500 cubic metres of water per day and discharges 1.2% of this volume as untreated effluent. How many cubic metres of untreated effluent are released each day?
Answer
54
The correct answer is 54 — Step 4: 4,500 × 0.012 = 54 m³. This is the daily untreated effluent released.
Step-by-step solution
- Step 1: Identify the total water consumption: 4,500 m³ per day.
- Step 2: Find the percentage of effluent: 1.2% = 0.012 in decimal form.
- Step 3: Multiply total consumption by the percentage to get effluent volume.
- Step 4: 4,500 × 0.012 = 54 m³. This is the daily untreated effluent released.
Common mistake: Multiplying 1.2% by 100 before calculation
Concept tested: Water pollution from textile units
Published · How this solution was prepared and checked
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