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A can do a work in 4 days, B in 5 day...

A can do a work in 4 days, B in 5 days and C in 10 days. Find the time taken by A, B and C to do the work together.

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RS AGGARWAL-TIME AND WORK-All Questions
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  10. A can do a certain job in 12 days . B is 60% more efficient than A....

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

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

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

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

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  17. 45 men can complete a work in 16 days. Six days after they started ...

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  18. 10 persons begin to work together on a job but after some days 4 pe...

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  19. 9 children can complete a piece of work in 360 days. 18 men can com...

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  20. 2 men and 3 boys can do a piece of work in 10 days while 3 men and ...

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