A car and a motorcycle move in the same direction by the same highway. At the beginning, the distance between them is 105 km. The car driver maintains an average speed of 90 km/h. What is the average

A car and a motorcycle move in the same direction by the same highway. At the beginning, the distance between them is 105 km. The car driver maintains an average speed of 90 km/h. What is the average speed of the motorcyclist, if the car driver caught up with him in 3 hours?