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[" 57."A" can do a piece of work in "18"...

[" 57."A" can do a piece of work in "18" days,"B" in "36" days,"],[" and "C" in "54" days."A" starts the work and is joined "],[" by "B" after "1" day,"C" joins them after "4" more days."],[" How many more days will be required to complete "],[" the work? "]

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