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?
0 B/ u0 z l* l3 g% a, Z# wwww2.tvboxnow.comA.50
) q) a8 q0 z' R3 _B.609 C! q p& u2 w' S5 q- n" ?
C.65公仔箱論壇) r- i/ N; W: Z) t- \' l* r
D.75 |
發表於 2007-9-11 07:38 PM
| 
