Mathematics · Time and Work
A tank can be filled by pipe A in 4 hours and by pipe B in 12 hours. Pipe A is opened at 10:00 a.m. If pipe B is opened at 11:00 a.m., at what time will the tank be full?
- 111:45 a.m.
- 21:30 p.m.
- 312:45 p.m.
- 41:15 p.m.✓
Correct answer
1:15 p.m.
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