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 t3 q4 i/ D5 d/ u' gtvb now,tvbnow,bttvbA.50 - R% W7 i# @1 }# b* R5.39.217.77:8898B.60 ' I9 B/ g$ f/ p4 Z公仔箱論壇C.656 |' u0 s. _% L4 b1 ^/ f
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
