Question 870964
Car A	65	km/h					
Car B	x  	km/h					
Car A		09:30					
Car B		11:00					
Difference in time=		01:30	=>	1.50	hours		
Car A	will have covered	97.50	miles	when	Car B	starts	
catch up distance=		97.50	miles				
catch up speed =		x  	-65				
catch up time = 5 hours

t=d/r

5=97.50/(x-65)

5x-325=97.50
5x=325+97.50
5x=422.50
/5
x=84.62  km/h-------------Car B