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?
/ U+ @* R# m: b" k( K5.39.217.77:8898A.50
( v- o: L3 t+ S3 i, X公仔箱論壇B.60
4 E# N& F* K+ s# dC.655.39.217.77:88982 ^' _: b% ?+ k- E( V2 n( H+ i
D.75 |
發表於 2007-9-11 07:38 PM
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