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?2 B+ j1 S2 H$ l# p/ p: B
A.50tvb now,tvbnow,bttvb/ z0 E O. s. p
B.60
1 |. P# S% G3 h2 T5 a5 Gwww3.tvboxnow.comC.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。3 [1 Y' k S4 ?. [
D.75 |
發表於 2007-9-11 07:38 PM
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