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A and B can do a piece of work in 9 d...

A and B can do a piece of work in 9 days; B and C can do it in 12 days; A and C can do it in 18 days. In how many days will A, B and C finish it working together and separately?

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RS AGGARWAL-TIME AND WORK-All Questions
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  13. 10 persons begin to work together on a job but after some days 4 pe...

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  15. 2 men and 3 boys can do a piece of work in 10 days while 3 men and ...

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