Question

the perimeter of 1 face of a cube is 40 cm find the sum of lengths of its edges​

Answer 1

$\boxed{\sf{SUM=120}}$

$\rule{200}{2}$

CUBE :-

Each face of a cube is Square.

Now,

PERIMETER = 40 cm

Perimeter of a square is 4 times its side.

So,

Let the side be x

So,

$4x = 40 \\ \\ \\ x = \frac{40}{4} = 10$

So,

The side of the cube is 10 cm

Now,

There are total 12 edges of cube.

Sum of length of edges of cube will be as follows :-

$12 \times 10 = 120cm$

$\rule{200}{2}$

Hence,

Sum of lengths of its side will be $\boxed{\rm{120 centimeters}}$

Answer 2

120 is your length of its edge