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? 4 m; e% P7 S! Z- P& d1 {3 p5.39.217.76A.50 # ?& l0 b& }6 b* D! ^4 n9 x% ytvb now,tvbnow,bttvbB.60公仔箱論壇8 l$ i' q/ R: E( d4 u$ O
C.65公仔箱論壇: ~( @( Q: f7 ~1 B) C" @5 l9 [' F0 u
D.75作者: genzo2106 時間: 2007-9-12 01:52 PM
answer is D:75作者: Alan8166 時間: 2007-9-12 03:37 PM
answer is D:75作者: dokho 時間: 2007-9-16 12:13 AM
D FOR DOG作者: ken87 時間: 2007-9-16 01:01 AM 標題: 回復 #1 nelston 的帖子
