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?公仔箱論壇8 S$ C$ _- ]8 u9 ~- _4 Z; }1 P
A.50% `, Y8 v2 a! x) X$ A0 e
B.60 ; c; o9 H! r0 m) Ltvb now,tvbnow,bttvbC.65 , S1 p; d2 m& t" etvb 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
