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) \ D2 m# y( y8 P" r- Z8 Z
A.50
/ |6 p' h2 Q9 j6 s" [+ Q0 {B.60TVBNOW 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。7 z" S# ]8 T z9 ~6 G
C.65
& Z6 W! A6 G4 X: T) K5.39.217.77D.75 |
發表於 2007-9-11 07:38 PM
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