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?tvb now,tvbnow,bttvb( Y$ R1 Z$ ?" W" G
A.505.39.217.76) J' u% G: [! b2 r# F( r, f
B.60
" I$ o' K& Q: ?C.655 v/ N% H1 U. z8 t: M& d+ @
D.75 |
發表於 2007-9-11 07:38 PM
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