Mathematics · Time and Work
A tank can be filled by two pipes A and B in 2 hours and 3 hours respectively. A third pipe C can empty the full tank in 6 hours. If all three pipes are turned on at the same time, the tank will be full in:
- 13 hours
- 21 hour 30 minutes✓
- 340 minutes
- 41 hour
Correct answer
1 hour 30 minutes
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