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?公仔箱論壇8 h, X+ ^/ ^/ { p
A.50 % h" ]4 L# s6 i K9 d* T6 }3 @公仔箱論壇B.60 4 C% v: i6 B+ g# nC.65tvb now,tvbnow,bttvb" {1 S. Z9 d1 g3 h P
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
