What is the surface area of the cube on the cube? We only have one number and it’s at the base of the cube and it’s 1.5 m so is the answer 27 m² 18 m² 4.5 m² or 13.5 m².

The surface area of a cube can be calculated by finding the area of one of its faces (one of the sides) and then multiplying by the number of faces.

Since the base of the cube is given as 1.5m, this means that each side of the cube is also 1.5m.

The surface area of one face of the cube is (1.5m x 1.5m) = 2.25m².

Since a cube has 6 faces, the total surface area of the cube is (2.25m² x 6) = 13.5m².

Therefore, the correct answer is 13.5 m².