How much time will a 620 m long train take to cross platform 800 m long if it is moving at a speed of 72 km/hr?
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as speed is 72 x 1000/3600 = 72000/3600=20m/s
speed = distance /time so time =distance /speed here distance is 800m so 800/20= 40second is the answer
speed = distance /time so time =distance /speed here distance is 800m so 800/20= 40second is the answer
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