<PRE><B>Question 726724</B>
Filling the pool is 1 job								
Pipe A + pipe B  takes		2	hours					
So they will do		1	/	2	of the job in 1 hour			
Pipe A alone takes		3	hours					
It does		1	/	3	of the job in 1 hour			
If Pipe A does the job in x hours it does 1/x of the job in 1hour								
1	/	2	-	1	/	3	=	1/x
LCD =	6							
(	3	-	2	)	/	6	=	1/x
1	/	6	=	1/x				
Cross multiply								
1	x	=	6					
	x=	6	hours					
</PRE>