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? * z) z+ b4 ?- F5.39.217.76A.50tvb now,tvbnow,bttvb, g' J3 N- n& J9 Q( x# Y
B.60 . y$ F- }; `/ p# u* ]公仔箱論壇C.655.39.217.76, l+ Y3 l0 Z9 t( H. {8 p6 B5 r
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
