Question

The speeds of 2 trains differ by 15 km/h. the slower train covers 4 hours what the faster train covers in 3 hours. find the speed of each train.​

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johb09513

01.03.2018

Math

Secondary School

answered

The speed of two trains differ by 15km/hour. The slower train covers in four hours while the faster one

covers the same distance in three hours. Find the speed of each train.

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Aanvigahoi

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let the distance covered be x km

speed of slower train =x/4

speed of faster train=x/3

thus...

x/4 + 15/1 = x/3

15 = x/3 - x/4

15 = x/12

15×12=x

180km =x

speed=>

slower train=180/4=45km/hour

faster train = 180/3 =60km /hour