Question 497378
Freight train	55	mph							
Passenger train	66	mph							
Freight train		02:00							
Passenger train		06:00							
Difference in time=		04:00	=>	4	hours				
Freight train	will have covered 220	miles	before 	Passenger train		starts	from station	
catch up distance=		220	miles						
catch up speed =		66	-55	mph					
catch up speed =		11	mph						
Catchup time = catchup distance/catch up speed									
catch up time=		220	/	11					
catch up time=		20	hours						

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