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?
& h+ k& K) w- I5 C& B sA.50
1 C i$ |- N- ~, l* a/ H, m# I9 Dtvb now,tvbnow,bttvbB.60os.tvboxnow.com4 Y$ U* b2 g) |) I1 K
C.65公仔箱論壇9 q" W8 Z9 C' l3 m
D.75 |
發表於 2007-9-11 07:38 PM
| 
