Question

find the lateral surface area of a cube whose edge is 5 cm​

Answer 1

Step-by-step explanation:

where,

a= 5cm

lateral surface area of cube = 4a = 4 ×5

= 20cm

Answer 2

Given:

The edge of a cube is 5 cm.

To find:

The lateral surface area of a cube.

Solution:

As we know that a lateral surface area of a cube is the surface area of four sides. So, the lateral surface area of a cube having side 'a' cm is given by:

$4 {a}^{2}$

( as the total surface area of a cube is 6a². So, the total surface area of a cube - surface area of two sides of cube = 6a² - 2a² = 4a² = surface area of four sides)

Now,

as given, we have,

Side of a cube = 5 cm

So,

The lateral surface area of the cube is

$= 4{a}^{2}$

$= 4 {(5)}^{2}$

$= 4 \times 25$

$= 100 \: {cm}^{2}$

Hence, the lateral surface area of a cube is 100 Square centimetres.