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?
% X) E' l9 z" Z9 I3 `TVBNOW 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。A.50公仔箱論壇/ p% }7 x9 H' x6 a
B.60
" t. g; }& v) ~; T2 yC.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。- f) n6 Y* h) O# C
D.75 |
發表於 2007-9-11 07:38 PM
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