Mathematics · Time and Work
An inlet pipe can fill a cistern in 12 hours and a leak can empty the completely filled cistern in 16 hours. If the efficiency of the inlet pipe is increased by 50% and the efficiency of the leak is halved, find the total time taken to fill 90% of the cistern.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 19 hours 36 minutes✓
- 28 hours 30 minutes
- 38 hours 35 minutes
- 49 hours 30 minutes
Correct answer
9 hours 36 minutes
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