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Mathematics, 03.11.2019 08:31 juansoto227711
Atrain covered the distance of 400 km between a and b at a certain speed. on the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. find the speed of the train at the end of its journey from b back to a, if the entire trip took 11 hours.
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Atrain covered the distance of 400 km between a and b at a certain speed. on the way back it covered...
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