Correct Answer - Option 1 : 81 m

^{2}
**Given:**

Length and breadth of rectangular garden is 14 m and 4 m respectively.

Perimeter of square field = Perimeter of rectangular garden

**Formula Used:**

Area of square = (Side)^{2}

Perimeter of square = 4 × Side

Perimeter of rectangle = 2 × (Length + Breadth)

**Calculation:**

Perimeter of rectangular garden = 2 × (14 + 4) = 36 m

So, the perimeter of a square field = 36 m

And, 4 × Side = 36 m

⇒ Side = 36/4 = 9 m

Now, Area of square field = (Side)^{2} = (9)^{2}^{ }= 81 m^{2}

**∴ The area of the square field is 81 m**^{2}.