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11 . Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. What is the ratio between the capacity of a man and a woman?
A. 2:3 B. 4:3
C. 3:4 D. 3:2

12 . A and B can do a piece of work in 6 2/3 days and 5 days respectively. They work together for 2 days and then A leaves. In how many days after that B will complete the work alone.
A. 2 days B. 1 ½ days
C. 3 days D. 3 ½ days

13 . 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?
A. 35 B. 40
C. 45 D. 50

14 . A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was compl
A. 12 days B. 10 days
C. 14 days D. 8 days

15 . A and B can do a piece of work in 12 days and 16 days respectively. Both work for 3 days and then A goes away. Find how long will B take to complete the remaining work?
A. 15 days B. 12 days
C. 10 days D. 9 days