Question

What is the surface area of a cube with faces that each have an area of 12 cm2?









A.

36 cm2








B.

48 cm2








C.

72 cm2








D.

144 cm2

Answer 1

the surface area of a cube is the area of the six squares that cover it. The area of one of them is a*a, or a 2 . Since these are all the same, you can multiply one of them by six, so the surface area of a cube is 6 times one of the sides squared.

\[6(12)=72\]
72 cm^2


so it is C