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?5.39.217.76 n7 O. |8 z3 ~4 m3 [; m
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。0 n6 c( \4 [) {+ g
B.60 E9 o+ |2 B0 c4 J% i
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D.75 |
發表於 2007-9-11 07:38 PM
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