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?tvb now,tvbnow,bttvb1 x; r4 \5 K, {. A0 C
A.50
4 l7 N$ L% v' w: H* G( BB.60TVBNOW 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。8 ~' \' ]9 W# ^; R" E" n1 C
C.65
& f! [: ?5 ~: X公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
| 
