the speed of an express train is x km/h and the speed of an ordinary train is 12km/h less than that of the express train .if the ordinary train takes takes one hour longer than the express train to cover a distance of 240 km, find the speed of the express train?
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speed of expressis xkm/h
speed of ordinary train is 12km/h
speed of ex press train 240/19i is 12.6315789474
speed of ordinary train is 12km/h
speed of ex press train 240/19i is 12.6315789474
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