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2014-05-25T14:02:37+05:30

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Let chair be denoted as x and table be denoted as y.
2x+y=700
X+2y=800
on solving both you get x=200 y=300
it is given that mx+my=30000
m(x+y)= 30000
m(200+300)=30000
m(500)=30000
m=60
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