Question

The length of a rectangle is 4 inches more than the width. The area is 45 square inches. Find the dimensions.The length of the rectangle is ? inches, while the width is ? inches.

Answer 1

Given:

The length of a rectangle is 4 inches more than the width.

That is, l=w+4

The area is 45 square inches.

To find the dimensions:

The formula of area of the rectangle is,

`\begin{gathered} A=l* w \\ 45=(w+4)w \\ w^2+4w=45 \\ w^2+4w-45=0 \\ (w+9)(w-5)=0 \\ w=-9,4 \end{gathered}`

Width can