The video tutorial explains how to calculate the surface area of a large cube formed by joining eight small cubes, each with a surface area of 30 cm². The process involves understanding the distribution of surface area across the cube's six faces and performing calculations to find the total surface area of the large cube. The tutorial also highlights key steps and marks awarded for solving the problem.

What is the total surface area of the large cube made from the small cubes?

Explain how you would find the area of one face of the large cube.