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?5.39.217.76# F) O7 ^7 M1 b- H1 S2 H' k+ f
A.50公仔箱論壇( M( b- f6 m* ^1 O# R6 y7 B T
B.60 - Y/ ?) M! O9 D, ?C.65tvb now,tvbnow,bttvb& A( `8 ^- ~% _) a. c, j0 R
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
