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?& t- z% |, b8 ~) [4 C7 L. B+ D
A.50
8 g- s6 s& ^* B% i" E1 IB.60
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D.75 |
發表於 2007-9-11 07:38 PM
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