Mathematics · Pipes and Cisterns
A tank can be filled by two taps A and B in 5 hours and 15 hours respectively. Tap C can empty the tank in 5 hours. If all three taps are opened simultaneously, approximately how long will it take to fill the tank completely?
- 112 hours
- 220 hours
- 315 hours✓
- 424 hours
Correct answer
15 hours
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