Question 448800
runner	9	mph					
bicycler	12	mph					
runner		12:00					
bicycler		12:30					
Difference in time=		00:30	0.5				
Runner will have covered 		4.5	miles	before 	bicycler		starts
catch up distance=		4.5	miles				
catch up speed =		12	-9	mph			
catch up speed =		3	mph				
Catchup time = catchup distance/catch up speed							
catch up time=		4.5	/	3			
catch up time=		1.5	hours
bicycler speed = 12 mph
time = 1.5				
12*1.5= 18 miles