Question 501589
Smiths	45	mph							
Jones	54	mph							
Difference in time=		00:12	=>	0.2	hours			(0.2*45)=9	
Smiths	will have covered	9	miles	before 	Jones	starts		
catch up distance=		9	miles						
catch up speed =		54	-45	mph					
catch up speed =		9	mph						
Catchup time = catchup distance/catch up speed									
catch up time=		9	/	9					
catch up time=		1	hour						

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