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?
( v( `* {5 R8 y4 mTVBNOW 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。A.50
/ i1 P% u$ {& t4 m: d8 ^TVBNOW 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。B.60
1 ^1 m- c$ T7 a5 M% ?8 O3 t! TC.65
9 P7 d2 e5 ], R4 s2 GTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
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