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?
6 m0 r. z, W$ ^ Y3 B i& Bos.tvboxnow.comA.50
, s' W' a2 n# H7 ~" U, _0 r& X. y, O2 Dos.tvboxnow.comB.60
( I8 {3 {1 e; B' P2 fC.653 V& W7 l9 f& n9 y
D.75 |
發表於 2007-9-11 07:38 PM
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