Multiple Choice QuestionsA can do a work in 12 days. When he had worked for 3 days, B joined him. If they complete the work in 3 more days, in how many days can B alone finish the work?
6 days
12 days
4 days
8 days
X is 3 times as fast as Y and is able to complete the work in 40 days less than Y. Then, the time in which they can complete the work together is
15 days
10 days
5 days
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 take to do it alone?
30 days
35 days
40 days
45 days
A and B working separately can do a piece of work in 9 and 12 days respectively. If they work for a day alternately with A beginning, the work would be completed in
A and B together can do a work in 10 days. B and C together can do the same work in 6 days. A and C together can do the work in 12 days. Then A, B and C together can do the work in
28 days
14 days
Two men A and B have started a job in which A was thrice as good as B and therefore took 60 days less than B to finish the job. How many days will they take to finish the job if they start working together?
15
20
25
A and B can separately do a piece of work in 20 and 15 days respectively. They worked together for 6 days after which B was replaced by C. The work as finished in next 4 days. The number of days in which C alone could do the work is
30 days
45 days
40 days
35 days
A and B together can complete a piece of work in 12 days. B and C can do it in 20 days and C and A can do it in 15 days. A, B and C together it in
6 days
8 days
10 days
12 days
C.
10 days
Shortcut Method:
Let A, B and C together can complete a piece of work in x days.
Now, 
A and B can complete a work in 3 days. They start together but, after 2 days, B left the work. If the work is completed after 2 more days, B alone could do the work in
4 days
6 days
8 days
10 days
A does 20% less work than B. If A can complete a piece of work in 
then B can do it in
4h
6h
8h
10h
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