Question

What is the perimeter of this figure?3x - 1x2-3xPerimeter3x² - 11xx+22+

Answer 1

Given:

Width of the building = 2y

Length of the building = 9y-4

Find-:

Area of building in terms of y.

Explanation-:

The area of a rectangle is:

$A=\text{ Length}\times\text{ Width}$

So the area of the given building is:

$A=2y\times(9y-4)$

Area is:

$\begin{gathered} A=2y\times(9y-4) \\ \\ =2y(9y)-4(2y) \\ \\ =18y^2-8y \end{gathered}$

The expression of area is:

$18y^2-8y$