<PRE><B>Question 633002</B>
Boat speed		x	mph									
current speed		12	mph									
..												
against currentspeed	x-	12										
withcurrent 	x+	12										
..												
Against current		12	hours									
with current x+y		3	hours									
Distance is same.  D=r*t												
12(x-12)=3(x+12	)
12x-144	=3x+36		
12x-3x	=144+36			
9x=180					
/	9											
x=	20	mph					
Boat speed		=	20	mph								
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