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?公仔箱論壇4 p$ I1 K6 X5 F6 D& R! F/ O' `% E
A.50
& d& R# J: _: x# Itvb now,tvbnow,bttvbB.60
; S: } N/ C2 f/ g D) R公仔箱論壇C.65
4 I, P0 s% M; y. k: B, F/ h. qD.75 |
發表於 2007-9-11 07:38 PM
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