Two cities A and B are 360 km apart. A car goes from A to B

• Time Distance

Two cities A and B are 360 km apart. A car goes from A to B with a speed of 40 km/hr and returns to A with a speed of 60 km/hr. What is the average speed of the car?

1. 48 km/hr
2. 55 km/hr
3. 50 km/hr
4. 45 km/hr

Answer

Average Speed = Total Distance / Total Time

Total Distance = 360 + 360 = 720 km

Total Time = 360/40 + 360/60 = 9 + 6 = 15 hr

Average Speed = 720/15 = 48 km/hr

The correct option is A.