The length of the rectangle is 13 meters.
Given that,
We know that
The following formula should be used:
[tex]Area = length\times width\\\\117m^2 = (4+x) \times (x)\\\\117m^2 = 4x + x^2\\\\4x + x^2 - 117 = 0\\\\x^2 +4x - 117\\\\x^2 -9x +13x - 117\\\\x (x - 9) + 13(x - 9)\\\\(x + 13) (x - 9)[/tex]
x = 9
So, the length should be
= 4 + 9
= 13
Therefore we can conclude that the length of the rectangle is 13 m.
Learn more about the rectangle here: brainly.com/question/16167300