Answers

2014-07-27T13:25:52+05:30
Length = 20cm
Let breadth = x
Length=2x
According to Pythagorus theorum
x^2+4x^2=20^2
5x^2=400
x^2=400/5
     =80
x=Root of 80
2x=2* root of 80
Perimeter=2(2*root of 80+root of 80)
              =5* root of 80
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