Answer: 70,400 pages
Step-by-step explanation:
We know that there are 4 people total(Bill, Friend 1, Friend 2, Friend 3), and they each read 55 books per year. Each book had 320 pages. To solve for the total number of pages, we must multiply the number books by number of friends(to get total books), and then multiply the number of books by the total amount of pages to get the answer.
Solving:
[tex]\begin{document}Total~ number~ of~ books~ read = 55 \, \text{books/person} \times~ 4 \, \text{people} = 220~ \, \text{books}\\Total ~number ~of ~pages ~read = 220 \,\text{books} \times ~320 \, \text{pages/book} = \boxed{70,400~ \text{pages}}[/tex]
So, Bill and his three friends read a total of 70,400 pages that year.
That's it!
