How many hours per semester must a students take to complete two years degree in four semester?

A two-year degree completed in four semesters requires a student to take a consistent number of hours per semester. To determine this, we need to know the total number of credit hours required for the degree. Two-year degrees typically range from 60 to 70 credit hours.

Let's assume a standard 60 credit hour degree. To complete 60 credit hours in 4 semesters, the student would need to take 60 hours / 4 semesters = $\boxed{15}$ credit hours per semester. If the degree were 70 credit hours, it would be 70/4 = 17.5 credit hours per semester, which is not possible, so some semesters would need to be slightly higher or lower than average.