Q11. 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 completed in :
A. 8 days
B. 10 days
C. 15 days
D. 12 days
Q12. A and B can do a job together in 7 days. A is  times as efficient as B. The same 4 job can be done by A alone in :
A. 11 days
B. 28/3 days
C. 49/3 days
D. 49/4 days
Q13. A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With the help of C, they did the job in 4 days only. Then, C alone can do the job in :
A. 10 days
B. 47/5 days
C. 48/5 days
D. 46/5 days
Q14. A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work ?
A. 5 days
B. 8 days
C. 6 days
D. 9 days
Q15. A can do a piece of work in 14 days which B can do in 21 days. They begin together but 3 days before the completion of the work, A leaves off. The total number of days to complete the work is :
A. 17/2
B. 51/5
C. 27/2
D. 33/5
Q16. Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is :
A. 16
B. 18
C. 15
D. 25
Q17. A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone ?
A. 30 days
B. 70 days
C. 40 days
D. 60 days
Q18. A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. In what time can the son do it alone ?
A. 8 days
B. 15/2 days
C. 7Â days
D. 13/2 days
Q19. A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in :
A. 10 days
B. 6 days
C. 5 days
D. 21/2 days
Q20. 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. 8 hours
B. 8 hours 25 minutes
C. 8 hours 15 minutes
D. 7 hours 30 minutes
