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? - d5 B: [# }( g9 Dtvb now,tvbnow,bttvbA.50 ) @% t$ M+ I: {4 ?3 hB.60tvb now,tvbnow,bttvb% ~' Z! {* A0 I" C
C.65 + [" g* Q' m$ h6 r公仔箱論壇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
