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?0 K- h0 }% z9 T' y
A.50TVBNOW 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。+ m& q$ E I/ X/ g2 d
B.60TVBNOW 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。- i' ?. _+ k2 d4 ?- R" r
C.65( T$ {! G5 F4 _2 ?% k3 i# Q
D.75 |
發表於 2007-9-11 07:38 PM
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