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?7 ]; \6 @/ K& U7 f* D1 M: U
A.50 4 M: P/ @8 l/ i, qtvb now,tvbnow,bttvbB.60 ; S% Y5 J+ j" p/ s+ Ltvboxnow.comC.65 ) y: [) N; |' G$ r0 z! n# ~tvboxnow.comD.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
