Mathematics · Time and Work
Two pipes A and S can fill an empty tank in 70 hours and 84 hours respectively. Pipe D can empty that completely filled tank in 105 hours. Initially only pipes A and S are opened, and after 35 hours pipe D is also opened. In how much total time will the initially empty tank be completely filled?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 148 hours
- 240 hours✓
- 335 hours
- 436 hours
Correct answer
40 hours
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