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Mathematics, 20.07.2019 05:30 20stirltrer

Atrain goes twice as fast downhill as it can go uphill, and 2/3 feet 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 per flat land?

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Atrain goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on...
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