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?tvb now,tvbnow,bttvb4 M' L: v$ N- v5 B
A.505.39.217.778 ^5 g. i$ h( s9 Z7 W& R6 o+ P/ R
B.60公仔箱論壇: X* q9 o+ L1 t' f& h
C.65公仔箱論壇1 S: N! f k1 f7 R$ U2 S
D.75 |
發表於 2007-9-11 07:38 PM
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