Question

The surface area of a cube of edge '2a' is
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Answer 1

Answer:

(6*2a)^2 = (12a)^2= 144a^2

Answer 2

Answer:

The surface area of the cube of edge '2a' is 24a²

Step-by-step explanation:

• The surface area of a cube means the total area that the cube covers

• The surface area of a cube is given by 6x² where x is the length of the edge of the cube
• Here we are provided with a length of the cube i.e. 2a and we are supposed to find its surface area

Calculation:

Simply substitute the given length in the formula for surface area

Surface area of cube = 6x²

Put x = 2a (given)

We get

Surface area = 6 *( 2a)²

On simplification we get

Surface area = 6 *4*a² = 24a²

Therefore the required surface area of the cube with edge length 2a is 24a²