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? " [. F* U% R: y4 [) y$ H% N5.39.217.77:8898A.505.39.217.77:88988 k3 F8 y8 Q7 @6 t5 n Z! t
B.60tvb now,tvbnow,bttvb. ?+ b2 M$ d6 M( N& E; I" n5 S
C.65tvb now,tvbnow,bttvb7 t. t- W/ @8 e+ w2 L9 U% V2 q
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
