Question

The width of a rectangle is 4 times its length, /. Which expressions represent the perimeter of the rectangle?

Answer 1

`P = 10l`

Explanation:

Let
`w =` width of rectangle,
`l =` length of rectangle

`P` =
`2l + 2w`

`\because`
`w = 4`×
`l`

`\therefore`
`P` =
`2l` +
`2(4l)`

=
`2l + 8l`

=
`10l`

Hope this helps :)