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     EduGorilla 
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    A and B together can do a piece of a work in 30 days, B and C together can do the same work in 20 days and C and A together can do the same work in 45 days. If all three start together and after 4 days A is not feeling well so he leave the job and B and C continue the work for next 4 days. After 8 days what part of the work remains?

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