Question

Find the surface area of a cube whose edge is 2.1 m.

Answer 1

A

=

26.46

m²

a

Edge

m

Solution

A

=

6

a

2

=

6

·

2.1

2

=

26.46

m²

Answer 2

The surface area of a cube $= 6 \: {l}^{2}$

Where$<i> L</i>$is the length of a cube.

So,
The surface area of a cube

$= 6 \: {(2.1)}^{2}$

$= 6 \: \times 4.41$

$= 26.46 \: {m}^{2}$