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?
: D3 U9 D1 _ _7 @' Dtvb now,tvbnow,bttvbA.50
+ T; c! Z8 k: P8 B6 r7 a. t公仔箱論壇B.60
0 b9 d/ ^6 ?6 F' m& @7 ptvb now,tvbnow,bttvbC.65
( q/ d c1 O0 ^- W% f' z公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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