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?公仔箱論壇/ i4 m8 W& d0 N9 L, E+ ]3 s
A.50( q! ^- m$ m0 ^9 \9 m- N
B.60tvb now,tvbnow,bttvb: N. @7 O0 K, B0 c
C.65
$ k* E, O7 K/ ^6 |; u6 e/ ?/ K4 o5.39.217.76D.75 |
發表於 2007-9-11 07:38 PM
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