The time Juan takes to grab his lunch from his office and back is half the time he takes to read a book. If he has a 4000-page book, how many pages does he read in an hour if he takes 4 hours to move from his office to grab lunch? Let's think first. Chain of thought:
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If Juan takes 4 hours to move from his office to grab lunch, moving from his office and back takes 2 * 4 = 8 hours. The time Juan takes to grab his lunch from his office and back is half the time he takes to read a book, meaning he reads a book in 8 * 2 = 16 hours. If he has a 4000 - page book, he will read 4000 / 16 = 250 pages in an hour.
Therefore, the answer is 250.
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