Aptitude - Chain Rule - Discussion

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Q.

3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?  .                          


A. 9 B. 10
C. 11 D. 12

Answer: Option D
Explaination:

 





Discussion

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