Heather left the airport and drove toward her friend's house at an average speed of 30 miles per hour. Cody left 2 hours later driving in the same direction at an average speed of 50 miles per hour. Find the number of hours it took for Cody to catch up with Heather.
At 2 hours Heather would be at 60 miles and Cody would just start so it would take him and hour to get to 50 miles and 20 more minutes to get to where Heather was.
