Final answer:
Tristan reads at a rate of 1.6 pages per minute, and it will take him 105 minutes to read a 168-page book.
Step-by-step explanation:
Calculating Time Based on Reading Speed
Tristan can read a book that is 24 pages in 15 minutes. To find out how long it will take him to complete a book that is 168 pages, we first calculate his reading speed. Tristan reads at a rate of 24 pages per 15 minutes, which can be broken down to 24 pages / 15 minutes = 1.6 pages per minute. Now, to determine how long it will take to read 168 pages, we use the formula:
Time (in minutes) = Total pages / Pages per minute
Therefore, Tristan's reading time for a 168-page book is:
168 pages / 1.6 pages per minute = 105 minutes.
So, it will take Tristan 105 minutes to read a 168-page book.