Model Aptitude questions & answers for placement

Q.  Pipe P can fill a tank in 4 hours, pipe Q in 8 hours and pipe R in 24 hours. If all the pipes are open, in how many hours will the tank be filled?

a. 2 hours
b. 2.4 hours
c. 3 hours
d. 3.5 hours


ANSWER: See Answer
 
No explanation is available for this question!
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