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?5.39.217.77:8898- ]' \8 N7 p/ G8 |0 t; |8 Z+ O
A.50
0 r$ b/ i$ j& f! J/ A公仔箱論壇B.60
( M9 D, E" C5 f$ ~TVBNOW 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
- T" D, e( }, h9 e, Y0 C5.39.217.77:8898D.75 |
發表於 2007-9-11 07:38 PM
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