Final answer:
The surface area of a 5mm cube is calculated using the formula for cube surface area, resulting in a total surface area of 150 mm².
Step-by-step explanation:
The surface area of a cube can be calculated by using the formula SA = 6 × s², where s is the length of a side of the cube. Since we have a cube with a side length of 5mm, we simply plug this value into our formula:
SA = 6 × (5mm)×(5mm) = 150 mm².
Therefore, the surface area of a cube with each side of 5mm length is 150 mm².