Question

$\huge \fbox \red{❥ Question}$


A train travels a distance of 480 km at a uniform speed. If the speed had been 8 km/h less, then it would have taken?​

Answer 1

• 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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