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。$ F5 `1 ~% m' V( D# w# r- W& R
A.50
& Z* g9 _ |) w( I5.39.217.77B.60
. S8 \* w8 l7 K% ltvb now,tvbnow,bttvbC.653 h- _4 x0 C% j# y
D.75 |
發表於 2007-9-11 07:38 PM
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