Mathematics · Time and Work
Two pipes D and E can fill a cistern in 26 hours and 78 hours respectively while working alone. If both pipes are opened together, how much time will they take to fill the cistern?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11913 hours
- 21914 hours
- 3192 hours✓
- 4184 hours
Correct answer
192 hours
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