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?5.39.217.767 f! O$ O8 Z* L: R1 h4 g
A.50
" P$ e% C4 S& \; A o4 _9 kB.60
3 r* n- g# _* _5 A" e7 @4 \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。C.65
: x6 Z8 W8 F9 ?' I' VD.75 |
發表於 2007-9-11 07:38 PM
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