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?公仔箱論壇2 Q( I) w# `* v/ t" E1 |1 |8 s
A.50tvb now,tvbnow,bttvb( n( S J5 W8 l& E( v* m; o' h9 P
B.60tvb now,tvbnow,bttvb. ?8 ?0 \: E& ^. V8 E/ e/ o
C.65
. _6 `1 b* K' U8 d3 I7 QD.75 |
發表於 2007-9-11 07:38 PM
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