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?5.39.217.771 @: t, Q5 H& v, C* H# r A, y
A.50* d0 T- H8 F0 I! x# ^' b
B.60
: L! k J" @1 D' ]! W& |tvb now,tvbnow,bttvbC.656 P0 I( L& m- }
D.75 |
發表於 2007-9-11 07:38 PM
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