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A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take t |
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Answer» 18 days 2(A + B + C)'s 1 day's work = ( 1/30 + 1/24 + 120 ) = 15/120 = 1/8 . |
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