Question

Q.The surface Area of a cube of edge a is
1. 4 X a²
2. 6 X a²
3. 3 X a²
4. a²
​

Answer 1

Step-by-step explanation:

Let the side of the cube be x

As volume of the cube=3

3

a

3

⇒x

3

=(3

3

a)

3

⇒x=

3

a

Hence the total surface are=6x

2

=6×(

3

a)

2

⇒6×3a

2

=18a

2

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