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? $ u3 m, P! P9 f4 E% Yos.tvboxnow.comA.50/ }4 ]; o- L! S! U
B.60tvb now,tvbnow,bttvb5 }( S' v: L8 A$ p& a6 Y4 e8 s
C.65 $ i0 C, w5 W% Y& H; Jtvb 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
