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?# m- o, @. q1 r
A.50
3 a& ?0 h& h P/ O, y公仔箱論壇B.60
, b$ y0 c- V& u9 U$ k A9 T5.39.217.76C.65公仔箱論壇9 y8 i% r' p4 [4 Q, ^
D.75 |
發表於 2007-9-11 07:38 PM
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