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?) x* @; z7 f+ C5 F" ~: Y) M: j: [) @
A.50 8 z# o( g8 ]1 ~1 S# hwww1.tvboxnow.comB.60% o5 q; D4 c j e
C.65公仔箱論壇6 }: J* j, B9 W. g& u6 L
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
