if a train is coming at a speed of 20km/hr and it's weight is 2000 and my speed is 5km/hr and my weight is 60 so how much speed do I have to come into to stop the train
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if a train is coming at a speed of 20km/hr and it's weight is 2000 and my speed is 5 km/hr and my weight is 60 so how much speed do I have to come into to stop the train
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