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?
& Z* p+ s& U( ]4 [tvb now,tvbnow,bttvbA.505.39.217.76( ^3 ^' O* Q8 t) M$ V$ W- H: E# L
B.605.39.217.762 Q k) q, K* B2 K
C.65
! F2 s8 E) M; P9 q! }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。D.75 |
發表於 2007-9-11 07:38 PM
| 
