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?tvb now,tvbnow,bttvb- S& v7 m- o1 u; e! J+ l H; A, X
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。. F; L4 S/ G% s D+ e2 ^8 k) G
B.60公仔箱論壇8 C& _0 [# J$ ^4 N3 b
C.65' l5 b( K5 s* i C* e! G2 {
D.75 |
發表於 2007-9-11 07:38 PM
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