Question

The width of a rectangle is the length minus 3 units. The area of the rectangle is 40 units. What is the width, in units, of the rectangle?

Answer 1

Width of the rectangle is 5 units

Explanation:

Let length (l) = l units

Given,

width (b) = l-3 units

Area of rectangle = 40 units

We know,

Area of rectangle = l X b

$40= l(l-3)\\40=l^{2} - 3l\\l^{2} - 3l -40=0\\l=8units$

If l = 8 units then, b = 8-3 units

b = 5 units

Therefore, width of the rectangle is 5 units.