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? 8 m) P, m, Z8 H" G* S% X, o5.39.217.77A.50$ u9 M: B, q- G1 }% K0 j
B.60 4 F4 Z8 d. ^5 {' }8 hC.65 % W+ F5 C. W2 ?6 r- C3 k$ l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
