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A can do a piece of work in 120 days and...

A can do a piece of work in 120 days and B can do it in 150 days. The work together for 20 days. Then, B leave and A alone continues the work. 12 days after that C joins A and the work is completed in 48 days more. In how many days can C do it, if he works alone?

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RS AGGARWAL-TIME AND WORK-All Questions
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