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?
2 s: ~; b, e4 ~$ s9 h3 vA.50TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。6 I+ C: q6 c; q7 `6 a: U/ X
B.60TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。3 Y6 k% q3 T( g
C.65
6 F/ y5 y- z3 T& r8 KD.75 |
發表於 2007-9-11 07:38 PM
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