The dragons Argothel and Bargothel like to get together for fiery conversations. They live some distance apart, each in his own cave. One day Argothel left home to visit Bargothel at exactly the same time that Bargothel left home to visit Argothel. The day being most agreeable, both dragons decided to proceed at a rather leisurely rate%u2014for dragons. So, rather than fly, they walked. Argothel walked at a constant rate of 24 miles per hour and Bargothel at a constant rate of 36 miles per hour.
How far apart were they 5 minutes before they met?