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? + n0 g! x2 i8 V5 F3 Z1 v& L! N4 f公仔箱論壇A.50 3 F: Q$ V3 o- ~ CB.60 / \/ y4 |3 z1 [, d7 c% T$ j0 v公仔箱論壇C.65 + X3 k: x& d* o& n" H- p: T4 D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
