Question 1040039
.
I know the answer to the problem, but what I need is to know how to write the equation. So here it goes....
The perimeter of a rectangle is 70 meters.
If the width is 40 % of the length, find the dimensions of the rectangle.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


<pre>
Let L be the length. 
Then the width W = 0.4*L, according to the condition.

The perimeter is 

L + W + L + W = 2L + 2W = 2L + 2*0.4*L = 2.8L,

and we have an equation 

2.8L = 70.

Then L = {{{70/2.8}}} = 25 m.

<U>Answer</U>.  The length is 25 m.  The width is 0.4*25 = 10 m.
</pre>

For many other similar problems see the lessons 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Points-lines-and-rays/Solved-problems-on-the-perimeter-of-a-triangle.lesson>Solved problems on the perimeter and side lengths of a triangle</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Points-lines-and-rays/Solved-problems-on-the-perimeter-and-side-lengths-of-a-right-angled-triangle.lesson>Solved problems on the perimeter and side lengths of a right-angled triangle</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Points-lines-and-rays/Solved-problems-on-the-perimeter-and-side-lengths-of-a-parallelogram.lesson>Solved problems on the perimeter and the side lengths of a parallelogram</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Points-lines-and-rays/Solved-problems-on-the-perimeter-and-side-lengths-of-a-rectangle.lesson>Solved problems on the perimeter and side lengths of a rectangle</A>

in this site.