Respuesta :

The area of one wall is 25 m²

The square room has a floor area of 81 m². Since the room is square, the walls sizes are the same.

The height of the room is 5 meters. Therefore,

Area of a square:

  • area = l²

l = length

l = 5 m

Area = 5²

Area = 25 m²

learn more on area here: https://brainly.com/question/373744