Respuesta :

Answer:

[tex]A=225cm[/tex]

Step-by-step explanation:

From the question we are told that:

Sides of the square post

[tex]L=15cm[/tex]  

Generally the equation for Area of a square A is mathematically given by

[tex]A=L*B[/tex]

Where L=B

Therefore

[tex]A=15*15[/tex]

[tex]A=225cm[/tex]