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?5.39.217.767 f; C! r2 O0 ?
A.502 E6 J* k. v6 @. E7 l/ `
B.605.39.217.763 j3 O9 J) ], r, q0 M" K* \ b
C.659 E1 @1 g1 |/ I# m5 y. i; g% A* w4 S
D.75 |
發表於 2007-9-11 07:38 PM
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