Pipes and Cistern - Quantitative Aptitude (MCQ) questions for Q. 28242

Q.  Two pipes M and N can fill a pool in 40 minutes and 60 minutes, respectively. The entire pool can completely be emptied by another pipe P in 30 minutes. M, N and P are opened alternatively and each is kept open for just 1 minute. In how much time will the pool be filled?
- Published on 10 Mar 17

a. 180 minutes
b. 167 minutes
c. 177 minutes
d. 165 minutes

ANSWER: 167 minutes
 
pipes and cisterns

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