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; z9 L7 h) \2 a' t2 K2 `4 v, a3 x
A.506 U" X3 l9 S* J% d' o
B.60
- I0 I- F! e% h公仔箱論壇C.65
: ]! F7 V+ y7 M: k) g7 r CD.75 |
發表於 2007-9-11 07:38 PM
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