The problem is incomplete, so I tried to search the internet of a similar problem. The problem is shown in the attached picture.
a.) The length of 75 is divided into 3 segments. So, 75/3 = 25. Each segment has a length of 25 units.
b.) The length of 75 is broken into 5 parts. So, 75/5 = 15. Each segment has a length of 15 units.