<PRE><B>Question 680833</B>
Walter		x	mph						
John		10	faster	x	+	10	mph		
									
Walter		252	miles						
John		312	miles						
Walter	time	=	John		time				
t=d/r									
252	/	x	=	312	/(	x	+	10	)
cross multiply									
252	(	x	+	10	)	=	312	x	
252	x	+	2520	=	312	x			
252	x	-	312	x	=	-2520			
-60	x	=	-2520						
/	-60								
x	=	42      	mph	

Walter speed = 42 mph
John speed = 52 mph					
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