E-PolyLearning

26. A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in :
a. 4 days
b. 6 days
c. 8 days
d. 12 days
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Answer: (c).8 days

27. 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. 5 days
b. 6 days
c. 10 days
d. 10(1/2) days
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Answer: (c).10 days

28. X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the work?
a. 13(1/3)days
b. 15 days
c. 20 days
d. 26 days
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Answer: (a).13(1/3)days

29. A and B can do a job together in 7 days. A is 1(3/4) times as efficient as B. The same job can be done by A alone in :
a. 9(1/3) days
b. 11 days
c. 12(1/4) days
d. 16(1/3) days
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Answer: (b).11 days

30. 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. 40 days
c. 60 days
d. 70 days
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Answer: (c).60 days

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