Yasmin is wrapping a box in the shape of a cube with a side length of (2x-3)

A. What is the surface area of the box?

B. What is the volume of the box

Respuesta :

Given:

Each side of the cube shaped box = [tex]2x-3[/tex]

To find the surface area of the box and the volume of the box.

Formula

If the each side of cube is a,

  • Its surface area [tex]SA = 6a^{2}[/tex]
  • Its volume [tex]V = a^{3}[/tex]

[tex](a-b)^{3}=a^{3}-3a^{2} b+3a^{2} b-b^{3}[/tex]

[tex](a-b)^{2}=a^{2}+b^{2}-2ab[/tex]

Now,

Putting [tex]a =[/tex] [tex]2x-3[/tex] we get,

The surface area, [tex]SA =6(2x-3)^{2}[/tex] sq unit

[tex]SA = 6(4x^{2}-12x+9)[/tex] sq unit

[tex]SA = 24x^{2} -72x+54[/tex] sq unit

And,

The volume, [tex]V = (2x-3)^{3}[/tex] cube unit

[tex]V = 8x^{3}- 36x^{2} +54x-27[/tex] cube unit

Hence,

The surface area of the box is [tex]24x^{2} -72x+54[/tex] sq unit and

The volume of the box is [tex]8x^{3} -36x^{2} +54x-27[/tex] cube unit.