Solution
Well, 1 hour = 60 minuts
V = 100m/h
S = 25m
t = S : V = 25 : 100 = 0,25h
t = 60 * 0,25 = 15m
That shows that if driver was driving 15 minutes with a speed 100m/h driver will drive distanse
of exactly 25m (I’m sorry if i lost something and if there are some mistakes)

This proof is not correct, the driver may have done 30 miles in the first 15 min, theb 20, then 30, then 20 again and in total it does 100 miles. What I mean is that his speed may not be uniform...
Thank you that writen it, can you explain it for me
I don’t understand this sentence sorry