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?
+ `# I: i4 M+ L- ]( SA.50, f4 p. g& h, T
B.60' ~- V4 N; `/ _# W
C.65公仔箱論壇6 r/ @0 a: u5 ]6 j+ e9 N% t
D.75 |
發表於 2007-9-11 07:38 PM
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