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?
1 z% L6 t9 x+ I W' k公仔箱論壇A.50
6 l: R4 L N3 H- w5 Q/ ^* a9 XB.60公仔箱論壇5 o! v" c: Z* ]8 H
C.65
2 y3 m& O1 G5 X% SD.75 |
發表於 2007-9-11 07:38 PM
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