Mathematics · Time and Work
Two pipes A and B can fill a cistern in 12 hr and 18 hr, respectively. Another pipe C can empty the full cistern in 36 hr. If A is kept open all the time and B and C are opened alternately for 1 hr each (starting with B), in how much time will the cistern be filled?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 110 hr 42 min
- 210 hr 17 min
- 310 hr 12 min✓
- 410 hr 30 min
Correct answer
10 hr 12 min
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