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? ~0 W ~% |6 qtvb now,tvbnow,bttvbA.50 , R% A; O- L1 g+ _4 |1 bB.60 % D S5 H8 Z0 d; J7 y) i* S& N3 @3 PC.65公仔箱論壇4 \/ z$ Z% Y& o. A4 u
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
