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?
9 W9 ^9 X9 o4 n* r& Z8 [A.50
1 i# U! n( r, O+ r: Qtvb now,tvbnow,bttvbB.60
! w0 H2 C8 B3 A$ L& D4 D4 @$ L/ T; N& }tvb now,tvbnow,bttvbC.65
( V( m! ]" d \- v6 LD.75 |
發表於 2007-9-11 07:38 PM
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