Answer:
160 minutes or two hours and 40 minutes
Explanation:
First, let's divide 2 hours of total work by the 15 minutes chunks she does.
2 hours = 120 minutes
120 minutes / 15 minutes = 8
She will have 8 sessions of studying with a break. Now we can calculate the total.
[] 120 minutes of studying
[] 8 * 5 minute break = 40 minutes of break
[] 120 + 40 = 160 minutes