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?www2.tvboxnow.com% }# @: D3 }2 K
A.50
5 v- b3 ?1 N" B8 m. H7 d! p4 |B.60
6 Q! a" n6 b: p7 ?$ _) U utvb now,tvbnow,bttvbC.65
( N# P* v. b F+ d9 i( X( btvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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