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?os.tvboxnow.com) Q$ i7 H4 y. I7 X9 f
A.50
' O; g6 d: D& B d& ]" z5 B$ ltvb now,tvbnow,bttvbB.60
0 o- Y* o! i* L7 |. n2 DC.651 h: P' f0 Z+ m) g5 w+ R" G
D.75 |
發表於 2007-9-11 07:38 PM
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