Question 903491
http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.903428.html
http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.903172.html
r*t=6480,
(r+45)(t-2)=6480
r = 360,   t = 18