Mathematics · Pipes and Cisterns
Pipes A and B can fill a tank in 30 hours and 45 hours, respectively, while pipe C alone can empty the full tank in 20 hours. When the tank is full, pipe C alone is opened for 8 hours and then closed. Immediately after, pipes A and B are opened together. How much time will pipes A and B together take to fill the tank completely?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17.2 hours✓
- 27.8 hours
- 38 hours
- 47.5 hours
Correct answer
7.2 hours
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