Lauren and Aidan left their offices at 6:15 p.m. and drove to meet at a restaurant the same distance away from their offices for dinner.
 Lauren drove at a constant speed of 39 miles per hour.
 Aidan drove at a constant speed of 42 miles per hour.
 Aidan reached the restaurant at 6:35 p.m.
 How far away was Lauren from the restaurant when Aidan reached?