Question 174130
This is the same problem as illustrated in http://www.algebra.com/algebra/homework/word/misc/Miscellaneous_Word_Problems.faq.question.174134.html 
except for different numbers and a slightly different relationship between length and width. Check out the solution to 174134 and you should be able to solve this one.


Your sketch is no more than one rectangle drawn inside of another with their centers coincident.