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?
. S# N& ~2 ?6 X: c! `; iA.50
9 j$ Z0 W: v0 ?6 s5.39.217.77B.60tvb now,tvbnow,bttvb! x9 Z. s2 K2 w% _7 ?
C.65
$ [. l( j/ v0 A4 H [& f3 U公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
| 
