5 typists can type 100 pages in 2 hours. At the same rate, how long will 3 typists take to type 90 pages?
Correct answer: A. 3 hours
Each typist types 100 ÷ (5 × 2) = 10 pages per hour. Three typists type 30 pages per hour, so 90 pages take 90 ÷ 30 = 3 hours.
hard