A car goes from town A to another town B with a speed of 40 km/h and returns back to the town A with a speed of 60 km/h. The average speed of the car during the complete journey is _______ .
A. 48 km/h
B. 50 km/h
C. Zero
D. None of these.
Answer:A
A car goes from town A to another town B with a speed of 40 km/h and returns back to the town A with a speed of 60 km/h. The average speed of the car during the complete journey is _______ .
A. 48 km/h B. 50 km/h C. Zero D. None of these.