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?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。% F5 A) r; K& S4 {) ]
A.50
0 I- P5 {( I' [6 T$ n6 v公仔箱論壇B.60
$ Q" u# h1 X" D. e. u$ Q' U; }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.655.39.217.77:8898+ H+ c' [5 _5 O, k. A3 k
D.75 |
發表於 2007-9-11 07:38 PM
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