34.Ronald and Elan are working on an assignment. Ronald takes 6 hours to type 32 pages on a computer, while Elan takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
A. 7 hours 30 minutes B. 8 hours
C. 8 hours 15 minutes D. 8 hours 25 minutes
Answer:
Number of pages typed by ronald in 1 hour = 32/6
= 16/3.
Number of pages typed by elan in 1 hour = 40/5
= 8.
Number of pages typed by both in 1 hour = (16/3+8)
=40/3.
Time taken by both to type 110 pages = (110×3/40)hrs
= 8×1/4hrs
