28 men can complete a piece of work in 21 days. How many more men must be hired to complete the work in 14 days ?
A). 12
B). 14
C). 16
D). 20
14
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1. A and B can complete a task together in 6 days. C and D can together complete the same task in 12 days. If A, B, and C together complete the task in 5 days, in how many days will D complete the task alone?
2. Amar started doing a work, but left it after 6 days. Chetan completed the remaining work in 8 days. If Chetan alone can do the work in 24 days, how many days would Amar take to complete the remaining work?
3. A does 4/5th of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?
4. P and Q can do a project in 150 and 100 days respectively. In how many days can they complete 60% of the project if they work together?
5. A and B together can do a piece of work in 36 days, B and C together can do it in 24 days. A and C together can do it in 18 days. The three working together can finish the work in
6. A and B together can do a work in 6 days. If A alone can do the work in 10 days then in how many days can B alone do it ?
7. A can do a work in 24 days and B can do it in 8 days. In how many days A and B can do the work?
8. A and B can do a piece of work in 15 days, B and C can do a similar work in 12 days and C and A in 10 days. How many days will A take to do the work by himself ?
9. A can do a certain Job in 12 days. B is 60% more efficient than A. To do the same Job B alone would take :
10. A and B together can complete a particular task in 4 days.If A alone can complete the same task in 6 days, how many days will B take to complete the task if he works alone ?
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