Using the following rule to calculate the speed of change of distance between each couple the car moving in one direction if speeds of these cars are constant and equal respectively 80km / h 20 m / c and 1000¼/¼¿¡/¼¿¡

96
80 km/h, 20 m/s * 3600 = 72 km/h, 1000 m / мин*60 = 60 km/h. Speed rasst. between the first and second = 8 km/h, mu 2 and 3 = 12 km/h, mu 1 and 3 = 20 km/h
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