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If Roger can do a piece of work in 8 days and Antony can complete the same work in 5 days, in how many days will both of them together compete it?

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RS AGGARWAL-TIME AND WORK-All Questions
  1. If Roger can do a piece of work in 8 days and Antony can complete t...

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  2. A and B together do a piece of work in 15 days. B can do it alone in 2...

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  3. A alone can complete a piece of work of Rs. 300 in 6 days; but by enga...

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  4. A can do a work in 4 days, B in 5 days and C in 10 days. Find the t...

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  5. If 5 students utilize 18 pencils in 9 days, how long at the same rate,...

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  6. A and B undertake to do a piece of work for Rs. 600. A alone can do...

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  7. A can do a piece of work in 7 days of 9 hours each and B can do it in ...

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  8. Rahul takes twice as such time as Manick and thrice as much time a ...

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  9. A and B can do a piece of work in 9 days; B and C can do it in 12 d...

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  10. A is twice as good a workman as B and together they finish a piece of ...

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  11. A can do a certain job in 12 days . B is 60% more efficient than A....

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  12. A can do a piece of work in 10 days and B in 20 days. They begin toget...

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  13. A can do a piece of work in 10 days , B in 12 days and C in 15 days.Al...

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  14. A and B can do a piece of work in 45 and 40 days respectively. They be...

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  15. A and B working separately can do a piece of work in 9 and 12 days ...

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  16. A can do a piece of work in 120 days and B can do it in 150 days. The ...

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  17. A and  B can do a piece of work in 12 days. B and C together can do ...

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  18. 45 men can complete a work in 16 days. Six days after they started ...

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  19. 10 persons begin to work together on a job but after some days 4 pe...

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  20. 9 children can complete a piece of work in 360 days. 18 men can com...

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