Answer:
If the side of the cube is 1.5 meters, then the total surface area to be painted is the sum of the areas of all six faces of the cube.
The formula for the surface area of a cube is given by:
Surface Area = 6s^2
where s is the length of one side of the cube.
Substituting s = 1.5m into the formula, we get:
Surface Area = 6(1.5)^2
= 6(2.25)
= 13.5 square meters
Therefore, Mrs. Buan will need to paint a total of 13.5 square meters of surface area on her wooden cube.