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?5.39.217.76! W+ t. `0 M. B
A.50
" y2 |0 Y) Z3 N# z- D# AB.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。" _; v. G) o1 S- w5 |' @
C.65
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發表於 2007-9-11 07:38 PM
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