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?
$ R, d9 Q ~5 C$ T3 r. R公仔箱論壇A.50TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。( s$ L7 Q6 l/ x8 O
B.60公仔箱論壇* e% h4 L: g1 `% P
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D.75 |
發表於 2007-9-11 07:38 PM
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