Stream of consciousness rationale: In one hour, there are 3 sets of 20 minutes. So, Joy can read 8 x 3 = 24 pages in an hour. It will take her 120 / 24 = 5 hours to read 120 pages.
The question and answer pair are described below.
Q: Joy can read 8 pages of a book in 20 minutes. How many hours will it take her to read 120 pages?
A: 5