The train runs at seventy kilometres per hour(how)
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Since the length of pole can be neglected, distance covered by the train while crossing the pole will be the length of the train.
Let the length of the train be ‘x’ m
Distance covered by the train = x m
Time taken = 9 s
Speed = 70 kmph = 70 × 5/18 mps = 350/18 mps
Distance= Speed × Time = (350/18)×9 m = 175 m
Hence the length of the train is 175 m.
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