Question
15 of
80
Question Palette
A can copy 75 pages in 25 hours. A and B together can copy 135 pages in 27 hours. How long will B take to copy 42 pages?
Correct Option:
C
Explanation
A copies 75/25 = 3 pages per hour. Together, A and B copy 135/27 = 5 pages per hour, so B copies 2 pages per hour. Therefore, B takes 42/2 = 21 hours.
