Surface area of the cube = 294 mm²
Solution:
Side of the cube (a) = 7 mm
Formula for the surface area of a cube:
Surface area = [tex]6a^2[/tex] sq. units
To find the surface area of the given cube:
Substitute a = 7 mm in the formula.
Surface area = [tex]6\times(7)^2[/tex]
= 6 × 49
= 294 mm²
Surface area = 294 mm²
Option C is the correct answer.
Hence the surface area of the cube is 294 mm².
