A train, 1km long, is travelling at the speed of 1km per minute. How many minutes will it take to cross a 1km long tunnel completely?
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a a 1 Kilo metre long train passes through our tunil of 2km length and a peak of 1 kilometre permanent how much time will it take to pass through it completely the last part of the train to be out of the tuner the answer is 3 minutes
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