- A50 min
- B37.5 min
- C62.5 min
- D75 min
Step-by-Step Solution
First half: min. Second half at L/min: min. Total 62.5 min. (75 min uses 80 L/min for the whole tank.)
Answer: C) 62.5 min
Water flows into a 6,000-litre tank at 120 litres per minute. Once the tank is half full, an outlet draining 40 litres per minute is opened. How long does the empty tank take to fill altogether?
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