A train travels from a to station b with a velocity of 100km/hand returns from station b to station a with a velocity of 80km/ h.its average velocity during the whole journey in ? and its average speed is ?
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average speed = 2xy / x + y
let x = 100km/h and y = 80km/h
average speed = 2×100×80 / 100 + 80
= 16000 /180
= 88.8 km/ h
hope it helps
let x = 100km/h and y = 80km/h
average speed = 2×100×80 / 100 + 80
= 16000 /180
= 88.8 km/ h
hope it helps
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