Two pipes P and Q can fill a tank in 10 hours and 14 hours respectively. If both pipes are opened simultaneously, how much time will be taken to fill the tank?

Two pipes P and Q can fill a tank in 10 hours and 14 hours respectivel

1.	Two pipes P and Q can fill a tank in 10 hours and 14 hours respectively. If both pipes are opened simultaneously, how much time will be taken to fill the tank?
A.	4 hours 20 min
B.	5 hours 49 min
C.	3 hours 50 min
D.	3 hours 22 min
Answer» C. 3 hours 50 min

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Two pipes P and Q can fill a tank in 10 hours and 14 hours respectively. If both pipes are opened simultaneously, how much time will be taken to fill the tank?

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