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A train takes 2 1/4 hours to reach its destination while traveling at an average speed of 64 mph. The return trip is 6 miles longer because the train must use another track to turn around. However, the train is then able to maintain a faster speed. The trip home takes no more than 2 hours. What is the minimum average speed for the return trip?
|dw:1351632154359:dw| Hmmmmmm I think this is the way we want to solve it, does this make sense?
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