a man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him if the goods train is 150 m long, find its speed
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a man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him if the goods train is 150 m long, find its speed
answer :Relative speed = 280/9 m / sec = 280/9*18/5 kmph = 112 kmph. Speed of goods train = 112 – 50 kmph = 62 kmph.