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?www2.tvboxnow.com' v) j V' H- n# P/ m, q
A.50 ) V$ m6 j- X4 N% q+ c公仔箱論壇B.603 Z! M6 H" t6 b& T- r8 Z% J
C.65; S) d& ~5 H8 S: e$ ^3 Q, L6 _9 _
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
