CRE 3 - Working Alternately | Arithmetic - Time & Work
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A and B can complete a work in 10 and 15 days respectively each. How long will it take to finish the work when they work on alternate days?
- (a)
6 days
- (b)
12 days
- (c)
4 days
- (d)
None of these
Solution
Discuss
ReportA and B can complete a work in 10 and 100 days respectively each. How long will it take to finish the work when they work on alternate days starting with B?
In the previous question, if A starts the work and they work alternately, how long will it take to complete the work?
- (a)
19
- (b)
18.5
- (c)
18.1
- (d)
None of these
A and B can complete a work in 10 and 20 days respectively each. At most how long will it take to finish the work when they work on alternate days?
A, B and C can complete a piece of work in 10, 20 and 40 days respectively. They work on a rotation basis with A working on the first day, B on the second. C the third. Then again A on the fourth day and so on. In how many days the work gets completed?
A group of workers was put on a job. From the second day onwards, one worker was withdrawn each day. The job was finished when the last worker was withdrawn. Had no worker been withdrawn at any stage, the group would have finished the job in two-thirds the time. How many workers were there in the group?
- (a)
2
- (b)
3
- (c)
5
- (d)
11
A and B can completely build a wall in 20 and 30 days respectively while C can demolish the entire wall in 60 days. If A, B and C work one after the other starting with A, then B and then C. On which day from the start will the work get completed.
- (a)
42
- (b)
43
- (c)
44
- (d)
45
- (e)
46