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A Train goes twice as fast downhill as it can go uphill, and 2/3 as fast uphill as it can go on level ground. if
A Train goes twice as fast downhill as it can go uphill, and 2/3 as fast uphill as it can go on level ground. if it goes 120 miles per hour downhill, how long will it take to travel 45 miles on flat land?
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Discrete Mathematics and Its Applications
Authors: Kenneth H. Rosen
7th edition
0073383090, 978-0073383095
