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 G+ t$ X& u3 i$ P% T
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。; b5 ?# ]; O8 n# o9 j+ M4 _, D
B.60
5 Z0 D: R# x8 c* ktvb now,tvbnow,bttvbC.65TVBNOW 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。% `$ o8 U% d7 P, K" `0 o! x
D.75 |
發表於 2007-9-11 07:38 PM
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