Question 682430
Rowing 	speed	=	3	mph														
current     	speed	=	x	mph														
								
against current	=	3	-	x													
with 	current	=	3	+	x 													
																		
Total distance =3	miles 	Total Time=	3.60	hours  											
Time upstream + time downstream =																		
																		
3/(3-x)+3/(3+x 	)=3.6						
3(3+x)+	3(3-x)=	3.60(9-	1X^2)
9+3x+	9-3x=32.4-3.6	X^2						
18	-	-32.4	=			-3.6	X^2											
-14.4	=-3.6	x^2														
-3.6	x^2=	-14.4																
x^2	=	4																
X =	+/-	2	

Ignore negative value
current speed = 2mph