Multiple Choice QuestionsA can do a certain work in 12 days. B is 60% more efficient than A. How many days will B and A together take to do the same job?
A does one-fifth of a work in a week. B finishes the same in a fortnight. B starts the work and works only for 3 days. Thereafter A completes the job. He will finish it in
10 days
7 days
12 days
12 days
A can complete a piece of work in 12 days. B is 60% more efficient than A. The number of days, that B will take to complete the same work is
6
8
8
A and B together can complete a piece of work in 12 days and B and C together in 15 days. If A is twice as good a workman as C, then in how many days will B alone complete the same work?
30
25
24
24
4 men and 6 women together can complete a work in 8 days while 3 men and 7 women together can complete it in 10 days. 20 women working together will complete it in
36 days
32 days
24 days
24 days
A and B can do a given piece of work in 8 days, B and C can do the same work in 12 days and A, B, C complete it in 6 days. Number of days required to finish the work by A and C is
16
8
12
24
If 90 men can do a certain job in 16 days, working 12 hours per day, then the part of that work which can be completed by 70 men in 24 days, working 8 hours per day is
1/3
2/3
7/9
5/8
A, B and C can do a work separately in 16, 32 and 48 days respectively. They started the work together but B left off 8 days and C six days before the completion of the work. In what time is the work finished?
10 days
9 days
12 days
12 days
A and B can do a piece of work in 30 and 36 days respectively. They began the work together but A left after some days and B finished the remaining work in 25 days. After how many days did A leave?
10 days
6 days
5 days
5 days
P and Q together can do a job in 6 days. Q and R can finish the same job in 
P started the work and worked for 3 days. Q and R continued for 6 days. Then the difference of days in which R and P can complete the job is
15
10
8
8
B.
10
(P + Q)'s 1 day's work = 
(Q + R)'s 1 day's work = 
Let P alone takes x days to finish the work
According to the question,
∴ Q's 1 day's work
R's 1 day's work
∴ Time taken by R = 20 days
∴ Required no of days = 20 - 10 = 10 days
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