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?www3.tvboxnow.com7 y1 ^' I9 C3 S/ i; y- @
A.50: x1 M6 e) S" w: f6 M
B.60
$ q/ J& g3 u" l- ctvb now,tvbnow,bttvbC.65
9 p2 @8 |) b) s" D1 @tvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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