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?5 q! |% q4 w8 ]# B& C1 I
A.50) W1 _/ g) J h
B.60
# h' v+ N6 U) L0 h7 rC.65
/ z4 D$ ?4 }, j! L8 ]- S+ qtvb now,tvbnow,bttvbD.75 |
發表於 2007-9-11 07:38 PM
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