Pipes and Cistern - Quantitative Aptitude (MCQ) questions for Q. 28558

Q.  A tap having diameter 'd' can empty a tank in 84 min. How long another tap having diameter '2d' take to empty the same tank?
- Published on 15 Mar 17

a. 21 minutes
b. 42 minutes
c. 168 minutes
d. 28 minutes

ANSWER: 21 minutes
 
pipes and cisterns

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