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? 5 @3 {7 M' L1 A htvb now,tvbnow,bttvbA.50 6 b2 X/ E6 |6 j# N6 ~ Ktvb now,tvbnow,bttvbB.60公仔箱論壇0 V# v l) K7 J9 `* g# h+ f
C.65 ; X8 a& h9 D; \: U" ?' ytvb now,tvbnow,bttvbD.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
