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?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。# d0 R1 K) b- f0 t7 d
A.50
. q4 [9 x- S/ n6 r* w H2 r+ sTVBNOW 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。B.60
2 @5 u& `0 g3 o- W# l1 e* k' RC.65
9 u" y! K& d6 u" L; ltvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
| 
