Final answer:
Kim takes 18 minutes to type and spell check 10 pages. By finding the per page rate and multiplying by 15, we calculate that it takes Kim 27 minutes to type and spell check 15 pages.
Step-by-step explanation:
The student's question is, how long it takes Kim to type and spell check 15 pages if it takes her 18 minutes to do 10 pages. To solve this problem, we determine the rate at which Kim works and then apply it to the 15 pages.
First, calculate the time taken per page by dividing the total time by the number of pages: 18 minutes ÷ 10 pages which equals 1.8 minutes per page.
Then, multiply the time taken per page by the number of pages in question, in this case, 15 pages: 1.8 minutes per page × 15 pages equals 27 minutes.
Therefore, it takes Kim 27 minutes to type and spell check 15 pages of a manuscript.