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?
; B0 f1 V& d$ o) \1 s4 n5.39.217.76A.505.39.217.760 k& W" f, P, M* g
B.60
V) t& L* e4 p+ N' V0 P ?5.39.217.76C.65
; _8 E# S9 j. U6 v- eD.75 |
發表於 2007-9-11 07:38 PM
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