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?
& r) q* o/ A6 b2 N# m: DA.50
! z1 ^, G, o: H% X4 x公仔箱論壇B.60
% p8 s) C' z3 e* g2 Q: {) k" KC.65
* x. w) T% n+ t6 {0 l0 L/ N3 jTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
| 
