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A Bullet Train in Japan starting from re...

A Bullet Train in Japan starting from rest accelerates uniformly at `0.5m s^(-2)` for 2 minutes. It then maintains uniform speed for 20 minutes and then retards uniformly at the rate of `0.25 m s^(-1)` and comes to rest. Calculate the average speed of the train

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The correct Answer is:
`53ms^(-1)`
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