if the train travels 480km at a uniform speed .if the speed had been 10km/hr more.it would have taken 4 hours less for the same journey find the speed of the train
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Answer:
30km/hr
Step-by-step explanation:
let speed = v
v = d/t = 480/t then t = 480/v ------- 1
if the train travels with more 10km/hr speed then it woul have take 4 hrs less time
i.e v + 10 = 480/t-4
t- 4 = 480/v+10
t = 480/v+10 + 4 ------ 2
equating equation 1 and 2
480/v = 480/v+10 + 4
solving the equation we get v = 30 and -40
v can't be -40 so v = 30
so speed of the train = 30km/hr
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