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?
& f" K) u" M0 ~& @) B7 m1 TA.50
$ d( k) K1 l$ Q& f5 m/ S' D3 U8 wB.60
% v2 q- i3 V. K0 T' Z( s& UC.65
0 Z1 r2 F D7 y& ~. ]6 V+ b( F5.39.217.77D.75 |
發表於 2007-9-11 07:38 PM
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