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。+ E# d( b: ?. C% q2 k+ p, I
A.50
+ _. X& @, e+ h7 q9 U2 Ltvb now,tvbnow,bttvbB.60; y0 |1 t0 P/ {+ a$ q/ k4 V6 d
C.659 f& p! `% O" ]
D.75 |
發表於 2007-9-11 07:38 PM
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