Question 1040983
<pre>
The train is 125 m or 0.125 km long.
It is traveling at x km/hr.

But relative to the man it is only going
(x-5) km/hr.

In 10 seconds (1/360 hr.) it travels (x-5)/360 km
relative to the man.

So at its speed relative to the man, it travels
through 1 train length (0.125 km) in 10 seconds
or 1/360 hr.

{{{(x-5)/360=0.125}}}

Solve that and get 50 km/hr.

Edwin</pre>