An engine pulls a train 140 miles. Then a second engine, whose average rate is 5 miles
Chapter 6, Problem 28(choose chapter or problem)
An engine pulls a train 140 miles. Then a second engine, whose average rate is 5 miles per hour faster than the first engine, takes over and pulls the train 200 miles. The total time required for both engines is 9 hours. Find the average rate of each engine.
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