# The area of one rectangle is 36 Square feet. The area of a second rectangle is 21 square feet. The rectangles have the same width and the dimensions are whole numbers. What is the width of both rectangles?

May 22, 2018

I think we need the high to measure the width

#### Explanation:

since the two rectangles have the same widths but they have different hights.

suppose :

the width equal $x$

the high of rectangle one equal $y$

the high of rectangle two equal $z$

the area of the rectangle given by $A = w i \mathrm{dt} h \cdot h i g h$

$\textcolor{red}{{A}_{1} = x \cdot y \Rightarrow 36 = x \cdot y \Rightarrow x = \frac{36}{y}}$

color(blue)[A_2=x*z rArr 21=x*z rArr x=21/z