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?5.39.217.761 R) {- l' N, H/ F! W$ @
A.50tvb now,tvbnow,bttvb4 C' x3 n/ t6 ?* y
B.60
- c- u! I) {( w! G公仔箱論壇C.65
" B3 T& I Q8 }: |, QD.75 |
發表於 2007-9-11 07:38 PM
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