<PRE><B>Question 523744</B>
Car I	x 	mph						
Car II	x+	20						
..								
They are moving towards each other								
								
So add up their speed.								
								
combined speed = x+		1	x	+	20			
(	2	x	+	20	) 			
Time = 	4	hours						
Distance =   	400	miles						
Distance = speed * time								
(	2	x		20	)*	4	=	400
8	x 	+	80	=	400			
8	x 	=	400	+	-80			
8	x 	=	320					
/	8							
x=	40	mph	Car I					
Car II	40	+	20	=	60	mph

m.ananth@hotmail.ca		
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