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?* y3 K( y: [' s# J* n
A.501 V6 E$ y7 h; o% S% P( T. {! K) C
B.60
# Y( @! H) e" `0 |) F/ `& m' |& K公仔箱論壇C.65
2 s1 O) }" P6 q0 htvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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