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。 ~: }% N0 I7 V5 Y8 |7 s
A.50
+ |4 T' t2 @1 C% B3 SB.60
, G8 o' e& w1 j9 _+ }1 V4 Z/ Vwww2.tvboxnow.comC.65
* c8 Z4 C4 z# T! B1 e+ OD.75 |
發表於 2007-9-11 07:38 PM
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