Two cars started at the same time, from the same point, driving along the same road. The rate of the first car is 50 mph and the rate of the second car is 60 mph. How long will it take for the distance between the two cars to be 30 miles?	Choose the correct answer
A) 1 hrs	B) 2 hrs	C) 3 hrs	D) 4 hrs	E) 5 hrs

Rationale: car 1 50 50 50 total = 150 car 2 60 60 60 total = 180 differece = 30 miles after 3 hrs . answer : c
Answer: C