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?www2.tvboxnow.com2 R- H2 _/ F; w; Z" p8 o* e- h6 j, j* e
A.50公仔箱論壇/ s6 f6 G# R# G% M5 ^9 V+ W
B.60
S6 E* f3 u: E. e9 ?% W$ g- nC.65www2.tvboxnow.com& l; e+ T, ~. `5 L* f6 J
D.75 |
發表於 2007-9-11 07:38 PM
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