Question

The distance between two stations

Answer 1

Total Distance=450km
Speed of 1st train=x km/hr
Speed of 2nd train=(x+5)km/hr
The distance covered by 1st train=y km
The distance covered by other train=425 -(y+20)km
Speed of 1st train,
Speed =distance/time
x=y/3,
3x=y,
Speed of 2nd train,
x+5=425-(y+20)/3

Substituting value of y,
x+5=425-(3x+20)/3
3x+15=425-3x-20
6x=390
x=65km/hr
x+5=70km/hr

Speed of 1st train=65km/hr
Speed of 2nd train=70km/hr

Hope this helps you