Actuary Joke: Walk half the distance

A mathematician and actuary are in a room. There is a pretty girl at the other end of the room. It takes 10 seconds to walk half the distance to the girl, another 10 seconds to walk half the remaining distance, another 10 seconds to walk half the remaining distance, and so on. How long will it take to reach the girl?

The mathematician replied ... "I will never reach the girl. No matter where I am, there is a distance and it takes 10 seconds to walk half of that distance."

What did the actuary say? .... Remember, the actuary is a practical person.