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?
( I: P1 I7 r% E( N( A! |5 ~0 Htvb now,tvbnow,bttvbA.505.39.217.764 c6 O+ M5 T$ O. d$ K4 m
B.60tvb now,tvbnow,bttvb/ f, U2 w/ }9 {2 g1 C+ C( l! W
C.65
% \3 a, a g# b" Q3 }) O4 h1 d$ @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
| 