Question

a train travels 480 kms at uniform speed if speed had been 10km per hour more it would have taken 4hr less for same distance.Find speed of train
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

let us consider that the initial speed was = "x" km/h

after a increase of 10 kmph in speed it takes 4 hrs less

so now speed is "x+10"

Also we know that , time = distance/speed

here distance is 480 km

so

480/x+10 - 480/x = 4

take LCM

=> 480 - 4800 = 4x + 40