If the perimeter of a circle is equal to that of square, then the ratio of their areas is
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perimeter of circle= 2πr
perimeter of square= 4*side
perimeter of circle /perimeter of square
= 2πr/4*side
side = πr/2
Area of circle /Area of square
= πr2/side 2
= πr2 / π2r2/4
= πr2*4/π2r2
= 4/π
ratio is 4:π
hope it will help u a lot
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