Question

Adam and John are typing to work on a computer. Adam takes 5 hrs to type 30 pages on a computer, while John takes 5 hrs to type 40 pages. if they are working together together on two different computers to type an assignment of 140 pages, how much time will they take? A.10 hrs B. 12 hrs C. 9 hrs D.15 hrs

Answer 1

they would take 10 hours. Adam completes 6 pages in 1 hour and John complete 8 pages in 1 hour. so if they work together they complete 14 pages. The total pages are 140. So time taken will be 140/14=10 hours