Two pipes A and B can fill a tank in 16 hours and 20 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

Two pipes A and B can fill a tank in 16 hours and 20 hours respectivel

1.	Two pipes A and B can fill a tank in 16 hours and 20 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?
A.	\[8\frac{8}{5}\]hours
B.	\[8\frac{8}{9}\] hours
C.	\[8\frac{17}{9}\]hours
D.	\[8\frac{7}{9}\]hours
Answer» C. \[8\frac{17}{9}\]hours

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Two pipes A and B can fill a tank in 16 hours and 20 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

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