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?5.39.217.77:8898/ N4 [. N2 Y, n$ d o7 K: V; H9 P5 Z1 E
A.50
6 t! y( E1 Q5 n4 D3 ?3 hB.60
" f& P, l0 p$ ?7 P5 _# U& A8 w' KTVBNOW 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。C.65
7 I, H, d( e9 ~# Y. Q公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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