Question

The formula for the perimeter, P, of a rectangle is P = 2(1 + w),

where l is the length and w is the width of the rectangle. If the
perimeter of a rectangle is 400 cm and its width is 45 cm, what
is its length?

Answer 1

Answer:
You he length of the rectangle is:
155 cm

Answer 2

`l=155cm`

Explanation:

Given the following question:


`P=2(l+w)`

`P=400cm`

`w=45cm`

In order to find the length of the given rectangle complete the following steps.

`400/2=200`

`200-45=155`

`l=155cm`

Check your work:

`P=2(l+w)`

`l=155`

`w=45`

`P=2(155+45)`

`155+45=200`

`2*200`

`2*200=400`

`p=400cm`

Hope this helps.