Answer:
8.5 hours
Explanation:
One car travels 55 miles per hour and another travels 31 miles per hour. If they start from the same place at the same time and travel in the same direction, after 8.5 hours will the faster car be 204 miles ahead of the slower car.
First Car: 55 miles per hour
Second Car: 31 miles per hour
55 - 31 = 24
204 miles ÷ 24 miles per hour = 8.5 hours