Question 761733
Area of square field = 5184m^2
Square root of 5184 = 72m 
Therefore perimeter of square field = 4 * 72 = 288m
Rectangular field.
Breadth = x
Length = 2x
Perimeter = 2*length + 2*breadth
          = 2(2x) + 2(x)
          = 6x
Perimeter of rect field = Perimeter of square field.
                     6x = 288m
                      x = 48m
Breadth of rectangular field = 48m
Length of rectangular field = 96m.
Hope this helps.
:-)