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?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。4 \' J) W _8 b4 Q. P! L" w
A.50
0 W; S" M0 [3 \5 Qtvb now,tvbnow,bttvbB.60公仔箱論壇& q3 S7 T2 Z6 e, `' z/ ?/ @
C.65
4 Z2 Y7 n- h; v9 v9 p$ wtvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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