A car travels equal distances in the same direction with velocities 60kmh −1 , 20 km h −1 and 10 km h −1 respectively. The average velocity of the car over the whole journey of motion is

Question: A car travels equal distances in the same direction with velocities 60kmh −1 , 20 km h −1 and 10 km h −1 respectively. The average velocity of the car over the whole journey of motion is