melanie0989
New member
- Joined
- Jun 22, 2015
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- 3
Two automobiles, A and B leave at same time and travel same route. Automobile A goes a rate of 55 miles per hour. Automobile B goes a rate of 40 miles per hour. How many hours after they begin the trip, will A be ahead of B?
The book says the answer is 4 hours. I'm not sure how to set up equation for that. I'm used to motion problems using the d=rt formula but there isn't even a distance to use in this problem.
The book says the answer is 4 hours. I'm not sure how to set up equation for that. I'm used to motion problems using the d=rt formula but there isn't even a distance to use in this problem.