Question 561062
Train A   	60	mph							
Train B 	70	mph							
Train A   		09:15							
Train B 		09:45							
Difference in time=		00:30	=>	0.5	hours				
Train A   	will have covered	30	m 	before 	Train B 		starts	from station	
catch up distance=		30	m 						
catch up speed =		70	-60	mph					
catch up speed =		10	mph						
Catchup time = catchup distance/catch up speed									
catch up time=		30	/	10					
catch up time=		3	hours						
						
It will catch up at 12:45 AM