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Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours.
Question 1:
Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled?
A.
2
B.
2.5
C.
3
Feedback
part filled by (A+B+C) in 1 hour = (1/5 + 1/6 + 1/30)=› 1/3.
All the three pipes together will fill the tank in 3 hours.
D.
3.5
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