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?tvb now,tvbnow,bttvb& J- {5 G, t: j- G7 R; b+ b$ Z9 v
A.50; W% h/ S& e# E6 P9 B+ ^3 W
B.60公仔箱論壇! C Y1 U9 c. U; j- H
C.65
7 U2 ^& M" M( I" e- v公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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