Question 1090889
<pre>
{{{drawing(400,40,-1,8,-15,10,

line(0,.4,6,.4),circle(1,0,.05), locate(0,-.1,A), locate(1-.1,0,B), locate(6-.1,0,C),
locate(.5,.6,x), locate(3.5,.6,5x) )}}} 

Let the answer be x

Then AB = x, and BC = 5x,

We are given that AC = 144 km

Since AC = AB + BC

     144 =  x + 5x

You finish.

Edwin</pre>