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 November 25th, 2013, 01:43 PM #1 Newbie   Joined: Nov 2013 Posts: 2 Thanks: 0 Proportions The length of a rectangle envelope is 2 1/2 times it's width. A plastic band surrounds the front and back of the envelope to secure it. The plastic band is 39 3/8 inches long. Find the length and width of the envelope.
November 25th, 2013, 02:17 PM   #2
Math Team

Joined: Dec 2006
From: Lexington, MA

Posts: 3,267
Thanks: 408

Re: Proportions

Hello, Mpigs89!

We need more information . . .

Quote:
 The length of a rectangle envelope is 2 1/2 times it's width. A plastic band surrounds the front and back of the envelope to secure it. The plastic band is 39 3/8 inches long. Find the length and width of the envelope.

Which way is the plastic band oriented?

Code:
*-------------------*
|                   |
* - - - - - - - - - *
|:::::::::::::::::::|
* - - - - - - - - - *
|                   |
*-------------------*
Code:
*-------*---*-------*
|       |:::|       |
|       |:::|       |
|       |:::|       |
|       |:::|       |
|       |:::|       |
*-------*---*-------*

 November 25th, 2013, 05:14 PM #3 Newbie   Joined: Nov 2013 Posts: 2 Thanks: 0 Re: Proportions Both horizontal and vertical around the envelope.
November 25th, 2013, 08:31 PM   #4
Math Team

Joined: Oct 2011
From: Ottawa Ontario, Canada

Posts: 14,143
Thanks: 1003

Re: Proportions

Quote:
 Originally Posted by Mpigs89 The length of a rectangle envelope is 2 1/2 times it's width. A plastic band surrounds the front and back of the envelope to secure it. The plastic band is 39 3/8 inches long. Find the length and width of the envelope.
Plus add'l info: "Both horizontal and vertical around the envelope"

Let width = w; then length = 5w/2

2w + 2(5w/2) = 39 + 3/8 : solve for w

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