Railway Track Problem
A train takes 2 minutes to acquire its full speed 60 kmph and 1 minute to come to rest from that speed. If somewhere between two stations, 1 km of track be under repair and the limited speed in this part be fixed to 20 kmph, find the late running of the train (in seconds), on account of this repair work, assuming otherwise normal at running of the train between two stations.
The answer is 160.
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