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?
/ N0 F6 u! P. U1 D9 j+ n: ATVBNOW 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。A.50
r B$ o2 g6 WTVBNOW 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.600 b/ u, c3 F. r
C.65tvb now,tvbnow,bttvb6 G" S5 K" E" l" U, ]
D.75 |
發表於 2007-9-11 07:38 PM
| 
