Two hockey pucks, labeled A and B, are initially at rest on a smooth ice surface and are separated by a distance of 18.0 m. Simultaneously, each puck is given a quick push, and they begin to slide directly toward each other. Puck A moves with a speed of 2.30 m/s, and puck B moves with a speed of 2.90 m/s What is the distance covered by puck A by the time the two pucks collide?