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,bttvb8 y7 I3 M; d0 ]4 Q5 q
A.50www3.tvboxnow.com1 j. N# Y9 I' x" _. n" [# Z q
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。6 R+ A' V8 p# y+ w, G
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發表於 2007-9-11 07:38 PM
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