Question 585203
Train A  	60	mph				
Train B  	80	mph				
Train A  		07:15				
Train B  		07:30				
Difference in time=		15 minutes	=>	0.25	hours	
Train A  	will have covered	15	miles	before	Train B  	starts  (0.25*60)
catch up distance=		15	miles			
catch up speed =		80	-60	mph		
catch up speed =		20	mph			
Catchup time = catchup distance/catch up speed						
catch up time=		15	/	20		
catch up time=		0.75	hours			
They will meet at		08:45	pm