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?
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B.60
[( @0 g* p- x8 `tvb now,tvbnow,bttvbC.65
- E2 {1 u4 g, x( t ]/ U$ i5 y公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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