Question 903829
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
http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.903491.html
r*t=4620,
(r+35)(t-1)=4620
r = 385,   t = 12