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& e5 E, m, c+ ~" T
A.50; M8 P) Y9 F7 Q' u. B! U6 I2 l9 ?
B.60
+ z8 Q8 b& r9 k9 Q& b6 V; G- @* FTVBNOW 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.65TVBNOW 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。+ S B8 x6 c4 k _ _& ~
D.75 |
發表於 2007-9-11 07:38 PM
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