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?; @' Q" G4 x1 V* u
A.50tvb now,tvbnow,bttvb/ x# F( I" r x* q& ?
B.60tvb now,tvbnow,bttvb0 ~; v6 _3 j" K2 S5 z$ K
C.65
5 Q7 O3 q1 C1 k3 Q& k( Htvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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