Question

The distance between two station is 482 km. Two trains start simultaneously from these stations on parallel tracks to cross each other. The speed one of them is greater than that of the other by 4 km/h. If the distance between the two trains after 3 hours in 20 km, find the speed of each train.

Answer 1

the first train speed. =x
the second train speed = 4km/hr
the distance between two trains after 3 hrs =20km
first train multiplied by 3 =3x
second train multiplied by 3 =4(3)=12
difference between the two trains after 3 km =20km
3x-12=20
3x=20-12
3x=8
x=8/3
x=2.666...

therefore the speed of the first train =2.666...km/hr

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