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?* e1 ? ~0 J! ]( S; t
A.50( w) O u; U1 G5 d U- I
B.60' V4 k0 K# e" I# x" G. \4 ~
C.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。5 K3 [+ P& B! m! ]
D.75 |
發表於 2007-9-11 07:38 PM
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