Question 736420
Boat speed	speed	=x	mph					
current     	speed	=y	mph					
against  	current     	14	hours					
with	current     	12	hours					
								
Distance against 		336	miles	distance with 		336	miles	
t=d/r	against	current     		-				
336	/	(	x	-	y	)=	14	
14	(	x	-	y	)	=	336	
14	x	-	14	y	=	336	....................1	
								
336	/	(	x	+	y	)=	12	
12	(	x	+	y	)	=	336	
12	x	+	12	y	=	336	...............2	
Multiply (1) by	6    							
Multiply (2) by	7							
we get								
84	x	+	-84	y	=	2016		
84	x	+	84	y	=	2352		
168	x	=	4368					
/	168							
x	=	26.00	mph					
								
plug value of x in (1)				y				
14	x		-14	y	=	336		
364			-14	-364	=	336		
-14	y	=	336					
-14	y	=	-28	mph				
	y	=	2.00					
Boat speed	speed	26.00	mph					
current     	speed	2.00	mph					
								
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