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?
; O0 L1 v7 x/ ~5 R! A+ {' n2 e$ o9 pA.50
+ s: z" c. i: a# x) S0 ~; l( c公仔箱論壇B.60
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D.75 |
發表於 2007-9-11 07:38 PM
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