A train travels with a speed of 60 kilometre per hour from station a to station b and then comes back with a speed 80 kilometre per hour from station b to station a find the average speed and the average velocity of train
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Average speed = 2v1v2 / (v1 + v2)
= 2 * 60 * 80 / (60 + 80)
= 9600 / 140
= 96/14 km/h
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