- A36 min
- B60 min
- C48 min
- D80 min
Step-by-Step Solution
300 L is 15% of the tank, so capacity L. From 25% full, 1,500 L are needed: min. (48 min starts from 40%.)
Answer: B) 60 min
A tank is 40% full. When 300 litres are pumped out, it becomes 25% full. A pipe delivering 25 litres per minute is then opened. How long will it take to fill the tank completely?
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