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?公仔箱論壇* d0 i7 w: A+ y& b0 J- M; i& M% S
A.508 p0 _( F0 X6 i7 Q& R& c
B.60
7 o- v& I/ B) |% S公仔箱論壇C.65
5 i" r( G6 P1 |, [1 K) Mwww2.tvboxnow.comD.75 |
發表於 2007-9-11 07:38 PM
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