Each book has 8,000 words because 100 x 80 = <<100*80=8000>>8,000

She can finish each book in 200 minutes because 8,000 / 40 = <<8000/40=200>>200

She will be reading for 1,200 minutes because 20 x 60 = <<20*60=1200>>1,200

She needs to check out 6 books because 1,200 / 200 = <<6=6>>6

# Answer

6
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sarah is checking out books from the library to read on vacation. She can read 40 words per minute. The books she is checking out have 100 words per page and are 80 pages long. She will be reading for 20 hours. How many books should she check out?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6
Sarah is checking out books from the library to read on vacation. She can read 40 words per minute. The books she is checking out have 100 words per page and are 80 pages long. She will be reading for 20 hours. How many books should she check out?
train