Stream of consciousness rationale: He reads 10 / 5 = 2 hours per day. That means he reads 2 * 50 = 100 pages per day. So he reads 100 * 7 = 700 pages in 7 days.
The question and answer pair are described below.
Q: Tom reads 10 hours over 5 days. He can read 50 pages per hour. Assuming he reads the same amount every day how many pages does he read in 7 days?
A: 700