Explanation:

Let's analyze the scenario:

- Original Cube: A 10 cm side results in a volume of 10³ = 1000 cm³ and a surface area of 6 * 10² = 600 cm².

- New Cube Volume: 8 smaller cubes each with volume 125 cm³ because 1000 cm³/8 = 125 cm³.

- Therefore, each side of the smaller cubes is 5 cm 

- New Surface Area: Each smaller cube has a surface area 6 * 5² = 150 cm², totaling 8 * 150 = 1200 cm².

The total volume remains the same, but the total surface area increases.

Option 3 (Total volume will remain the same and total surface area will increase) is the correct choice