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?tvb now,tvbnow,bttvb( C) s$ l# Y4 e2 Q2 a& S- L% ~4 v" n
A.509 g% \; z0 B' w1 ~
B.60
& s! i w( j- \, ?tvb now,tvbnow,bttvbC.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。( A6 [( `7 P6 e0 m
D.75 |
發表於 2007-9-11 07:38 PM
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