Consider two cities P and Q between which consisted bus service is available in both the directions every 'x' minutes. A morning jogger is jogging towards Q from P with a speed of 10 km/hr. Every 18 minutes a bus crosses this jogger in its own direction of motion and every 6 minutes another bus crosses in opposite direction. What is the time between two consecutive buses and also find the speed of the buses?
9 min, 20 km/hr