1. A and B can together do a piece of work in 15 days. B alone can do it in 20 days. In how many days can A alone do it ?
30 days
40 days
45 days
60 days
2. A is twice as good a workman as B and together they finish a piece of work in 14 days. A alone can finish the work in:
11 days
21 days
28 days
42 days
3. A can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the work in 42 days. The two together could complete the work in:
24 days
25 days
30 days
35 days
4. Twelve men can complete a work in 8 days. Three days after they stated the work, 3 more men joined them. In how many days will all of them together complete the remaining work?
2
4
5
6
5. A can complete a job in 9 days, B in 10 days and C in 15 days. B and C start the work and are forced to leave after 2 days. The time taken to complete the remaining work is:
6 days
9 days
10 days
13 day
6. A can do a piece of work in 20 days which B can do in 12 days. B worked at it for 9 days. A can finish the remaining work in:
3 days
5 days
7 days
11 day
7. A and B can do piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in:
15 days
24 days
30 days
40 days
8. A and B can do a piece of work in 6 days and A alone can do it in 9 days. The time taken by B alone to do the work is :
18 days
15 days
12 days
7 days
9. A can do (1/3) of a work in 5 days and B can do (2/5) of the work in 10 days. In how many days both A and B together can do the work ?
7
8
9
10
10. A does half as much work as B in three-fourth of the time. If together they take 18 days to complete a work, how much time shall B talk to do it?
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