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?tvb now,tvbnow,bttvb( r! j: \: ]: L# {) s: T+ G, r
A.50 7 W! v; J$ e& S2 r9 u5 O( S公仔箱論壇B.60www2.tvboxnow.com4 _; B1 }3 ^( I9 z" n" w
C.65 7 E8 m# N" m% F9 r+ q ]- ND.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
