a) Total distance travelled = 23 km
Total time taken = 28 min = 28/60 h
Average speed of the taxi = Total distance travelled/Total time taken = 23/(28/60) = 49.29 km/h
b) Distance between the hotel and the station = 10 km = Displacement of the car
Average velocity = 10/(28/60) = 21.43 km/h
Therefore, the two physical quantities (average speed and average velocity) are not equal.