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?* V$ m3 ?, J' H6 q4 {! l% H# p
A.505.39.217.77# r" [, _" m# \, Y6 R
B.60公仔箱論壇) w& X) h9 B# n. |% e
C.65
/ `/ M/ B5 L! p2 j9 d0 n5.39.217.77D.75 |
發表於 2007-9-11 07:38 PM
| 
