Question 565874
Boat 	speed	=x	mph				
current   	speed	=y	mph				
against  current x-y		5.00	hours				
with current x+y		3.00	hours				
							
Distance = same=		60	km				
t=d/r							
60	/	(	x	-	y	)=	5.00
5	(	x	-	y	)	=	60.00
5	x		-5	y	=	60	....................1
60	/	(	x	+	y	)=	3.00
3.00	(	x	+	y	)	=	60
3.00	x	+	3.00	y	=	60	...............2
Multiply (1) by 	3.00						
Multiply (2) by	5.00						
we get							
15	x	+	-15	y	=	180	
15	x	+	15	y	=	300	
30	x	=	480				
/	30						
x 	=	16	mph				
							
plug value of x in (1)							
5	x		-5	y	=	60	
80			-5	y	=	60	
-5	y	=	60	-80			
-5	y	=	-20				
	y	=	4	mph			
The speed of  	Boat 	=	16	mph			
The speed of  	current   	=	4	mph