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?5.39.217.77( J& g9 x( l/ u9 W+ a; B
A.50
% v+ l6 c& _- o$ R公仔箱論壇B.60
; _5 u- h( D Dtvb now,tvbnow,bttvbC.65
) k( d3 ?( S" ?7 X/ |tvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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