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?公仔箱論壇$ x: V9 e& i7 L# u
A.50tvb now,tvbnow,bttvb9 K& ?: l; J; a' _+ {
B.60公仔箱論壇! P) ^$ U4 [- \8 Y! z' ^, Y/ Z
C.65
* A/ s4 p+ ~& W6 q. |' G" PTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
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