A train is targeted from Delhi to Mumbai at an average speed of 80 km/h but due to repairs of track loses 2 hrs in the first part of the journey. If then accelerates at a rate of 20 km/h2 till the speed reaches 100 km/h. Its speed now maintained till the end of the journey. If the train now reaches station in time. Find the distance from when it started accelerating.
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the answer is 840
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