Question 480763
Car A	40	kmph						
Car B	60	kmph						
Car A		08:00						
Car B		12:00						
Difference in time=		04:00	=>	4	hours			
Car A	will have covered	160	miles	before 	Car B		starts	from home
catch up distance=		160	miles					
catch up speed =		60	-40	mph				
catch up speed =		20	mph					
Catchup time = catchup distance/catch up speed								
catch up time=		160	/	20				
catch up time=		8	hours					

In 8 hours Car B would travel 8*60 = 480 miles.
That is where they meet

m.ananth@hotmail.ca