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2/5 of 40 is 16 Perimeter of rectangle is 16-2.4 i.e 13.6 l length of rectangle is x breath of rectangle is 1/3x Perimeter of rectangle is 2(l+b) 2(x+1/3x)=13.6 4/3x=13.6/2 4/3x=6.8 x=68/10×3/4 x=5.1 breath is 1/3 of length i.e 2.7 Length=5.1 Breath=2.7
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