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?! |# \! f3 C3 ?9 g; \) c
A.50tvb now,tvbnow,bttvb- }8 g: \# S |/ b
B.60
# g5 m D+ e4 m6 m1 wtvb now,tvbnow,bttvbC.655.39.217.77# e* @. e+ b& k1 r, b: s D
D.75 |
發表於 2007-9-11 07:38 PM
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