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?
& \* g ]1 k! i& g7 _, w* p公仔箱論壇A.50
) h5 f8 N- T/ { G! `B.60
3 e) B" u' C4 v& S! }5 F3 CTVBNOW 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。C.65
i d- B) T* k% b% n6 ZTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
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