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?; _# v& x4 S0 q8 L" l
A.50
' n$ B# {& d8 y. j/ eB.604 p/ F! Y6 o3 @
C.65
$ D3 }# v7 T8 e% @3 t公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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