Question

A train travels a distance of 480 km at a uniform speed. if the speed had
been 8 km/hr less, then it would have taken 3 hours more to cover the
same distance. Find the usual speed of the train.
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Answer 1

Answer:

40km/h

Step-by-step explanation:

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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