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?os.tvboxnow.com; m: V: L( I5 Q0 N- h7 H: |
A.50os.tvboxnow.com* i1 H: ]! m8 A) c: m
B.60 a2 Y4 w& H' D$ L5 G
C.65tvb now,tvbnow,bttvb0 }6 N' W1 n G" G8 m6 a2 J8 E
D.75 |
發表於 2007-9-11 07:38 PM
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