Distance Catch Up Calculator

<-- Person 1 Rate per Hour
<-- Person 2 Rate per Hour
<-- Number of Hours Person 2 leaves late

The following practice problem has been generated for you:
Person 1 leaves for a destination traveling at 120 miles per hour
Person 2 leaves 2.7 hours later traveling at 180 miles per hour.
How long before Person 2 catches up with Person 1?