Answer:
294
Explanation:
Surface area is the total area of the bases
The cube shown has a side length of 7
Cubes have 6 bases, each being a square, and the area of a square can be calculated by squaring the side length.
7^2 = 49
So the area of 1 base is 49
If we want to find the area of all the bases we multiply the area of 1 base by 6 ( because there are 6 bases )
42 * 6 = 294
The area of all of the bases is 294 so the surface area is 294