there r 2 groups of worker.. skilled n partially skilled. if both group work togather they nid 30 days to finish the job. if partially skilled worker can oni do 2/3 of the skilled worker did in a day. how many days needed if only partially skilled worker is workin to finish the job?公仔箱論壇3 h0 A, s# K1 F" `
A.50
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C.65' C, \+ d7 R: z" V5 L
D.75 |
發表於 2007-9-11 07:38 PM
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