How much diesel fuel (gallons) is required to move a unit train (100 cars) with 125 tons of freight per car from Salt Lake City to Denver (517 mi)?The density of diesel fuel is 6.9 lb/gallon. how much...

How much diesel fuel (gallons) is required to move a unit train (100 cars) with 125 tons of freight per car from Salt Lake City to Denver (517 mi)?The density of diesel fuel is 6.9 lb/gallon. how much CO2 is emitted by the train?  CO2 is 0.875 and cf is 3.206000. What is the carbon footprint for the train, expressed as tons of CO2 per ton-mile?