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?
7 O: H) ]7 C* N. k/ U3 `' c5.39.217.76A.50# K' K# v, t3 m
B.60
" B. V+ Z* c( d/ NTVBNOW 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。C.65tvb now,tvbnow,bttvb: x3 e& p7 K% l9 ?# t5 S/ v2 Z o
D.75 |
發表於 2007-9-11 07:38 PM
| 
