Question 499530
Car I		--------	450	km/h	
Car II		--------	620	km/h	
					
they are traveling 	away from	each other			
so add up speeds					
620	+	450	=	1070	km/h
Distance =		2800	km		
time = d/r					
time=  		2800	/	1070	
Time =   		2.62	h