Mike reads 40 pages of a book in 50 minutes. David can read 10 more pages than Mike in 50 minutes. How many pages should David be able to read in 80 minutes? A) 10 B) 48 C) 80 D) 84

The answer is C, 80 because it says David can read 50 pages in 50 minutes (because he can read ten more than Mike, and Mike read 40) Which means he read a page a minute, therefore he would read 80 pages in 80 minutes.