28/100
And that can be simplified
14/50 to 7/25
So 7/25 is the most simplified version
A. The answer is 2. It does not matter what x is.
The cattle train
speed - 36.5 km/h
time - x h
the passenger train
speed - 29.2 km/h
time - (2.4+x) h
The cattle train caught up to the passenger train so the distance they travelled is the same.
Distance is speed times time.

The passenger train travelled for
12 hours before the cattle train caught up.
D. comes first as it has the most significant figures. Hope this helps!!