The average speed is calculated by dividing the total distance of a journey by the total time taken to complete the journey. The distance here is 2 kilometers and the time is 20 minutes or 1/3 hours. Expressing the speed in km/hr:
2 / (1/3) = 6 kilometers per hour
or in meters per second:
2000 / (20 * 60) = 1.67 meters per second.
