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?
`' C+ P& J4 dTVBNOW 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& D2 X3 x4 F) K& N
B.60. b4 o) ~) ]/ u8 R5 a
C.65
0 p* x3 Q/ A3 B0 c5.39.217.77:8898D.75 |
發表於 2007-9-11 07:38 PM
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