SOLUTION: The length of a rectangle is 10 feet longer than it is wide. If each side is increased 10 feet, then the area is multiplied by 4. What was the size of the original rectangle?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The length of a rectangle is 10 feet longer than it is wide. If each side is increased 10 feet, then the area is multiplied by 4. What was the size of the original rectangle?      Log On


   

Question 1162564: The length of a rectangle is 10 feet longer than it is wide. If each side is increased 10 feet, then the area is multiplied by 4. What was the size of the original rectangle?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Dimensions w+10 and w, originally

Original area, w(w+10)

The Increase:
%28w%2B10%29%28w%2B20%29=4w%28w%2B10%29
If this much is clear to you then you know how to continue.