Hi, I may have discovered a textbook error but I'm no calc whiz. I need an assist to find out if the question unintentionally described a square instead of a rectangle. I have attached the textbooks solution as well as my attempt at a solution. The numbers check out, I just want to make sure before I submit a request for review to the author (my prof). Of course there's always the potential that he's just trying to be a tricky guy.