Question 885659
This answer in the link works for all such rectangle questions of the same type.  That is why the generalization was used.


The answer is HERE:   <a href="http://www.algebra.com/algebra/homework/Finance/Finance.faq.question.885665.html">This is what is needed to know.  Click on this for how to answer all of these kinds of questions.  http://www.algebra.com/algebra/homework/Finance/Finance.faq.question.885665.html</a>