Pipes and Cistern - Quantitative Aptitude (MCQ) questions for Q. 28489

Q.  Two pipes M and N can fill a tank in 22.5 and 15 minutes, respectively. If both the pipes are opened simultaneously, after how much time should N be closed so that the tank is full in 18 minutes?
- Published on 15 Mar 17

a. 4 minutes
b. 3 minutes
c. 4.5 minutes
d. 2.5 minutes

ANSWER: 3 minutes
 
pipes and cisterns

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