E-PolyLearning

21. 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
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Answer: (b).6 days

22. 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. 12 days
d. 15 days
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Answer: (c).12 days

23. A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work?
a. 18 days
b. 24 days
c. 30 days
d. 36 days
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Answer: (a).18 days

24. A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work in :
a. 4 days
b. 6 days
c. 8 days
d. 18 days
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Answer: (a).4 days

25. 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. 3 : 4
b. 4 : 3
c. 5 : 3
d. Data inadequate
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Answer: (b).4 : 3

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