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? / Y( R7 Y5 Q1 ~: C9 p0 dtvb now,tvbnow,bttvbA.50tvb now,tvbnow,bttvb# J1 H: U$ k% h* L5 \ D
B.60 $ |; H9 W0 k# T) uC.65 w, m$ E& {' F/ n) @& oD.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
