Question 504291
Train A  	80	mph							
Train B 	90	mph							
Train A  		10:25							
Train B 		10:55							
Difference in time=		00:30	=>	0.5	hours				
Train A  will have covered	40	miles	before 	Train B starts	from station	
catch up distance=		40	miles						
catch up speed =		90	-80	mph					
catch up speed =		10	mph						
Catchup time = catchup distance/catch up speed									
catch up time=		40	/	10					
catch up time=		4	hours						
it will catch up at 2:55 pm