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? ( T$ w B. J# r+ S! x公仔箱論壇A.50公仔箱論壇7 \: V$ _: E: @9 X
B.60 ' k* H( W( v% e; H; p) I/ P8 yC.65 + l3 y' {$ Z0 s" Ttvb now,tvbnow,bttvbD.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
