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?- \! I* Z5 H$ Y! _: O& H, ~
A.50tvb now,tvbnow,bttvb# H) L% j# [9 V c: G% x& t& d5 S7 P
B.606 m' K; N# ?' u
C.65
$ M2 G1 k$ L. D0 E/ C公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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