Question 1031704
Boat speed	speed	=	20	mph														
current     	speed	=	x	mph														
															0.60			
against 	current	=	20	-	x													
with 	current	=	20	+	x 													
																		
Total distance =		198	miles 		Total Time=	20.00	hours  											
Time upstream + time downstream =																		
																		
198	/(	20	-	x 	)+	198	/(	20	+	x 	)=	20						
198	(	20	+	x 	)+	198	(	20	-	x 	)=	20.00	(	400	-	1	X^2	)
3960	+	198	x	+	3960	-198	x  	=	8000	-	20	X^2						
7920	-	-8000	=			-20	X^2											
-80	=		-20	X^2														
-20	X^2=	-80																
X^2	=	4																
X =	+/-	2																
it can't be negative