Mathematics, 22.07.2021 21:50 lildee16lildee

An empty freight train traveled 60 miles from an auto assembly plant to an oil refinery. There, its tank cars were filled with petroleum products, and it returned on the same route to the plant. The total travel time for the train was 4 1 2 hours. If the train traveled 20 mph slower with the tank cars full, how fast did the train travel in each direction

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An empty freight train traveled 60 miles from an auto assembly plant to an oil refinery. There, its...