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?
4 t# k: |2 q) X8 W! _A.50tvb now,tvbnow,bttvb. H; @# H# z- }
B.60tvb now,tvbnow,bttvb3 Q. l/ N% y! Q% h2 [) z! X, t
C.65
/ L$ n& }0 x6 C# m7 I' ztvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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