A 420-page book contains an average of 600 words per page, and Roslyn reads the book at the rate of 360 words per minute. How many hours did it take her to read the book? Express your answer as a mixed number.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A 420-page book contains an average of 600 words per page, and Roslyn reads the book at the rate of 360 words per minute. How many hours did it take her to read the book? Express your answer as a mixed number.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
11 \frac{2}{3}
A 420-page book contains an average of 600 words per page, and Roslyn reads the book at the rate of 360 words per minute. How many hours did it take her to read the book? Express your answer as a mixed number.
train