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?
- n6 K7 M5 B4 _7 ?7 ftvb now,tvbnow,bttvbA.50
1 G% w' a7 {4 A) A1 pB.605.39.217.777 s8 N4 F# @$ h# I; b* z/ \
C.65+ E+ R/ ^1 g( I: l. T% E
D.75 |
發表於 2007-9-11 07:38 PM
| 
