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?
% `3 o; {5 v) n1 m, X* M7 CA.50
1 H& ~% V4 W( ]- ]4 g: @% z9 q sB.600 X( \. j% z" H g2 J
C.65$ h. F0 f2 |/ n) A& z$ J
D.75 |
發表於 2007-9-11 07:38 PM
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