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,bttvb. I) b! y9 B8 B
A.50
# p o; r+ A/ S1 L0 j6 Q% j9 p5 o5.39.217.77:8898B.60
0 N9 Z$ P/ E4 W5 v N) }& H公仔箱論壇C.65
6 ?- k" Q6 C$ I. l# g# C2 w0 b& fD.75 |
發表於 2007-9-11 07:38 PM
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