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A train starts from rest with uniform acceleration of 0.25 m/s^2 and attains a speed of...

A train starts from rest with uniform acceleration of 0.25 m/s^2 and attains a speed of 45 kmph which subsequently remains constant. One minute after the start of train A, another train B steams off on a parallel track with uniform acceleration of 0.45
m/s^2 If the maximum speed gained by train B is 60 kmph, how much time it will take for train B to overtake train A?

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