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?
* q1 O" c$ k! w6 a+ S+ n7 VA.50tvb now,tvbnow,bttvb% `* W; n1 M8 h* y0 o- ^8 z0 S
B.60$ v& u& d" g* h3 ?( z+ E8 _
C.65公仔箱論壇( k. k2 S( r" @/ l6 G" ^. k
D.75 |
發表於 2007-9-11 07:38 PM
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