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! t3 y9 `$ p. y2 }5 I8 o
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B.60
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發表於 2007-9-11 07:38 PM
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