SOLUTION: The area of a certain rectangle is 288 yd the perimeter is 68 yd if u double the width and length what will the new area and perimeter of the new rectangle be?

Algebra ->  Surface-area -> SOLUTION: The area of a certain rectangle is 288 yd the perimeter is 68 yd if u double the width and length what will the new area and perimeter of the new rectangle be?      Log On


   

Question 1026534: The area of a certain rectangle is 288 yd the perimeter is 68 yd if u double the width and length what will the new area and perimeter of the new rectangle be?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Subscript d for "doubled".
system%28A=wL%2CA%5Bd%5D=2w%2A2L%29

A%5Bd%5D=2%2A2%2AwL
A%5Bd%5D=4wL
A%5Bd%5D=4%2AA

You only need to know that you have a rectangle, and that you know that the original area is some constant, given as 288 SQUARE YARDS in your example. The perimeter will not be needed here.

If you want also to know the new perimeter,...,..., just go through a similar process using formula for perimeter. Recognize that perimeter is LINEAR, but area is SQUARE or QUADRATIC.