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
D.
24
A = x days, B = y days, C = 2x days.
...(ii)
By equation (i) - (ii), we have
∴ From equation (i),
∴ B will finish the work in 20 days.
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
Switch
