A train covers its journey from A to B with a speed of 40 km/h and while returning
along the same line the speed is 30 km/h, find the average speed for the entire
journey.
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Explanation:
Since the distance from A to B and B to A is same, so average speed given by the formula, s =
2*V1*V2/(V1 + V2)
2*40*30/70
= 2400/70
=240/7
=34.28 km/h
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