Question 503264
Train A  	40	mph							
Train B 	60	mph							
Train A  		02:10							
Train B 		02:25							
Difference in time=		00:15	=>	0.25	hours				
Train A  	will have covered	10	miles	before 	Train B 		starts	from station	
catch up distance=		10	miles						
catch up speed =		60	-40	mph					
catch up speed =		20	mph						
Catchup time = catchup distance/catch up speed									
catch up time=		10	/	20					
catch up time=		0.5	hours						
catch up time=		00:30	minutes						
It will catch up at 			02:55