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?
) o8 Q+ k; _. j1 p' W/ } e" z公仔箱論壇A.50
( Y! x5 \: V7 D$ E7 A' O: Xtvb now,tvbnow,bttvbB.60
4 n; H& W5 D6 G- o% F1 u3 gtvb now,tvbnow,bttvbC.65
- j; L! B) F/ h2 E e公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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