Two cars leave the same place at the same time traveling in the same direction for 3 hours.

Question

Two cars leave the same place at the same time traveling in the same direction for 3 hours. the first car travels twice as fast as the second car. how fast is the second car traveling if they are 90 miles apart when they stop?

Answer 1

Since the first car is twice as fast as the second, it traveled twice as far. So if it was 90 miles ahead, the second car only traveled 90 miles in 3 hours or 30 mph.