A train travel a distance 480 km at a uniform speed . if the speed had been 8km/h less, then it would have taken 3 hours more to cover the same distance.we need to find the speed of the train
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Distance travelled by the train = 480 km Let the speed of the train be x kmph Time taken for the journey = 480/x Given speed is decreased by 8 kmph Hence the new speed of train = (x – 8) kmph Time taken for the journey = 480/(x – 8) 1280 = x2�– 8x�x2�– 8x – 1280 = 0 On solving we get x = 40 Thus the speed of train is 40 kmph
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