Question 669155
Length of the diagonal = diamter of the circle

area = 57m^2

Area of square = l^2  where l is the length of the side of square.
{{{l = sqrt(57)}}}

The diagonal can be found out by Pythagoras theorem
{{{(side1)^2+(side2)^2= hypotenuse^2}}}

{{{(sqrt(57))^2 + (sqrt(57))^2= diagonal^2}}}

{{{57+57 = diagonal^2}}}

{{{114 = diagonal ^2}}}
{{{diagonal = sqrt(114)}}}

{{{Area of cirlce= pi*(d^2/4)}}}  where d is the diameter

Area = pi*114/4

area = 89.57 m^2