Mike can read 15 pages of a book in 24 minutes.
If he is to read 45 pages of the book, we can conceptualize this question like this:
45 pages = 15 pages + 15 pages + 15 pages.
since each 15pages he reads, it will take him 24 minutes, we can say
45 pages = 15 pages + 15 pages + 15 pages.
X minutes = 24 minutes + 24 minutes + 24 minutes.
Where X is the total amount of minutes it will take to complete 45 pages.
Therefore,
X minutes = 72 minutes
Thus,
The answer is 72 (C)