Solution:
Given that the area of the square ABCD is 289 sq. meters with each side (x+4) m.We know that, Area of a square = .
Therefore, Area of the square = .
Already given, area of square is 289.
So,
= 17
x = 17 - 4
x = 13
As a result, the needed value of x = 13.
The correct option is (3).