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?/ b; E" ], V: |/ Y2 c/ h7 }
A.50 X( T' s q/ ~1 ttvb now,tvbnow,bttvbB.60 7 i( n: d0 `( }, B3 O0 t5.39.217.76C.65 % ?5 o# K% Q) l- eD.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
