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? 0 F/ e) _+ ~/ m# _1 D! jA.50 ( \7 Z0 P9 s4 P& _- htvboxnow.comB.60 ; {2 Q) _& @3 z: ]$ D6 q7 D) u公仔箱論壇C.65 , j3 U. |& s" U; R& q+ R1 @, Ptvboxnow.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
