The motorcyclist left the city at 8:00 about the speed of 50 km/h at 9:00 a trace behind it the car with a speed of 75 km/h through what time left the Motorist will catch up with the motorcyclist?

1) 9-8=1 (h) - the motorcyclist before departure of car 2) 75-50=25 went (km/h.) - makes up for car 3) 50/25=2 (ch). Answer: the car will catch up with the motorcyclist in 2 hours.
Answer add