Tap A can fill a tank 6 hours and tap B can empty the same tank in 10 hours. If both taps are opened together, then how much time (in hours) will be taken to fill the tank?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e 15
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Understanding Tricks |
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Application
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Now combine efficiency = 5 - 3 = 2 unit/hour Hence Total time = 30/2 = 15 hours |