Two pipes A and B can fill a tank in 45 hours and 36 hours, respective – McqOptions

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1.	Two pipes A and B can fill a tank in 45 hours and 36 hours, respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?
A.	20 hours
B.	2 hours
C.	10 hours
D.	5 hours
Answer» B. 2 hours

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