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?
) g; @, X9 Q+ A# F# H公仔箱論壇A.50
1 ^3 y( G* J8 O. Z M( j/ U, K! B% XB.60
& S& S/ v" }2 T( M7 s公仔箱論壇C.65& B/ v9 F2 U% K" ~+ d5 k
D.75 |
發表於 2007-9-11 07:38 PM
| 
