Chapter 5.1, Problem 5STP

Shawn needs to read a book that is 374 pages long. The graph shown at the right shows his progress over the first 8 hours of reading. If he continues to read at the same rate, how many hours total will it take for Shawn to read the entire book?

A. 15 hours

C. 19 hours

B. 17 hours

D. 21 hours

To determine

To calculate: Total hours to read the entire book.

Answer to Problem 5STP

Total hours it takes for S to read the entire book are $17\text{ hours}$

Explanation of Solution

Given data: Length of the book is $374$ pages. According to the graph, S takes $8$ hours to read $176$ pages of the book.

Formula used: Number of hours takes to read a page of the book*total number of pages.

Calculation: S reads 176 pages in 8 hours.

To read a single page, S would take $\frac{8}{176}=0.045\text{ hour}$

Now, to read entire book of 374 pages, it takes

  $0.045\text{ hour}\times 374\text{ pages = 17 hours}$

Conclusion:Thus, correct answer is B. Total hours it takes for S to read the entire book are $17\text{ hours}$