A train travels along a straight line at constant speed of 60 miles/h for a distance ‘d’ and another distance equal to ‘2d’ in the same direction at a constant speed of 80 miles/h. Find the average speed of the train for whole journey?
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Train travels Distance = d with speed (v1) = 60m/h. Another distance Travelled by train = 2d with speed (v2) = 80m/h.
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