<PRE><B>Question 667752</B>
Boat speed	=	8	mi/h										
current speed	=	x	mi/h										
				x									
speed against	wind	8	-	x									
speed with	wind	8	+x										
													
Distance against	wind	12	miles										
Distance with	wind	20	miles										
													
t=d/r	time against = time with		wind	-									
12/(8-x	)=20/(8+x)
12(8+x)=20(8-x)			
96+12x	=160-20	x					
20x+12x=	160		-96						
32	x	=	64										

/	32			
x	=	2	mi/h										

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