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?5.39.217.76- j% p8 R7 w$ ~7 g. H' m
A.50
) g/ C y* P8 d4 l+ ~( gB.60
/ R3 P n: { \8 q; J& P' v5.39.217.76C.65
# {9 y# R S& q1 t+ J0 [, N! V7 Q公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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