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16 . 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. 4 days B. 6 days
C. 10 days D. 16 days

17 . A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?
A. 18 days B. 20 days
C. 24 days D. 30 days

18 . A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
A. 4 days B. 6 days
C. 8 days D. 12 days

19 . A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?
A. 6 days B. 8 days
C. 8 ½ days D. 7 ½ days

20 . A can do a piece of work in 40 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone c
A. 24 days B. 30 days
C. 44 days D. 17 1/2 days




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