Solution:let the speed of train = x speed of car = y According to the question.120/x + 480/y = 8 (1)
200/x + 400/y = 8 + 20/60
Rightarrow 15/x + 60/y = 1 (1)
Rightarrow 200/x + 400/y = 25/3
Rightarrow 8/x + 16/y = 1/3 (ii)
Multiply (i) with 8 and (ii) with 15.
120/x + 480/y = 8 (120/x + 20/y + 3)/(20/y + 3)
15/x + 60/y = 1
x = 60
Ratio of Both = 60:80=3:4