- A1 h 30 min
- B30 min
- C2 h 15 min
- D45 min
Step-by-Step Solution
In minutes: → 90 min h 30 min. (30 min adds the drain's rate.)
Answer: A) 1 h 30 min
A water tank is filled by a pump in 45 minutes, while its drain empties a full tank in 1 hour 30 minutes. If both run together starting from empty, how long until the tank is full?
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