Aptitude - Pipes and Cisterns - Discussion

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Q.

A cistern can be filled in 9 hours but it takes 10 hours due to in its bottom. If the cistern is full,then the time that the leak will take to empty it, is: (U.D.C. 1993)                         
A. 60 hrs B. 80 hrs
C. 70 hrs D. 90 hrs

Answer: Option D
Explaination:

 


Discussion

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