Posted by **casey** on Thursday, September 3, 2009 at 9:12pm.

Blue prints allow an area of 20,000 square feet for the playground. the width of the rectangular playground is 80 feet less than its length and its perimeter is 640 freet. what is the length of the playground?

- algebra 1 -
**DrBob222**, Thursday, September 3, 2009 at 9:24pm
Let L = length

W = L-80

So L-80 + L-80 + L + L = 640.

Solve for L.

- algebra 1 -
**Emily**, Thursday, September 3, 2009 at 9:28pm
Area = L * W

Perimeter = 2L + 2W

W = L - 80

So, plug in the width formula into the perimeter equation, which would look like this:

640 = 2L + 2(L-80)

640 = 2L + 2L - 160

640 = 4L - 160

800 = 4L

L = 200

It looks like you don't even need the information about the area of the playground; just the perimeter.

Hope this helps! If you have any questions about my method just post :)

## Answer This Question

## Related Questions

- geometry - The perimeter of rectangular playground is 200 feet. If the length is...
- basic geometric - 10. a rectangle has width the same as a side of a square whose...
- math - The surface area covered by a rectangular playground is 100 square yards...
- Math - A school is fencing in a rectangular area for a playground. It plans to ...
- algebra - The dimensions of a playground are 50 feet by 75 feet. You want to ...
- Algebra - The length of a rectangular playground exceeds twice its width by 25 ...
- Math asap - 2.David wants to build a pen for his goat. He wants the area of the ...
- Math - A park has a rectangular playground area that has a length 66 feet and ...
- geometry - the area of the rectangular playground enclosure at South School is ...
- basic geometry - A rectangle has width the same asa a side of a square whose ...

More Related Questions