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[" 95.A and "B" can separately do a piec...

[" 95.A and "B" can separately do a piece of work in "20],[" and "15" days respectively.They worked togethe "],[" for "6" days,after which "B" was replaced by "C" .If the "],[" work was finished in next "4" days,then the numbe "],[" of days in which "C" alone could do the work will be "],[[" (a) "30," (b) "35],[" (c) "40," (d) "60]]

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