Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. If they are opened at alternate hours and if pipe A is opened first, in how many hour will the tank be filled?

Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. I

1.	Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. If they are opened at alternate hours and if pipe A is opened first, in how many hour will the tank be filled?
A.	5 hour
B.	\[5\frac{2}{3}\] hours
C.	4 hours
D.	\[4\frac{2}{3}\]hours
Answer» E.

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Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. If they are opened at alternate hours and if pipe A is opened first, in how many hour will the tank be filled?

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