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?tvboxnow.com( @# e! c& I- w. L6 `
A.50tvb now,tvbnow,bttvb* j0 J6 N1 F2 }: y" r
B.60tvboxnow.com1 e6 h) g3 A& L |; N0 |4 F
C.65tvb now,tvbnow,bttvb( g) r; ?. J+ s9 k: \9 y. w7 e# Z
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
