In 2 hours 40 minutes a car travels 160 kilometers. At what average speed is the car travelling?
Show workings bit by bit
2 hours = 120 minutes
Total time = 120 + 40 = 160 minutes
Average speed = 160 kilometers / 160 minutes
Average speed = 1 kilometer / minute
Therefore, the car is travelling at an average speed of 1 kilometer per minute.
speeds of cars are usually expressed in km/h or mph
speed = distance/time = 160/(2 2/3) km/h
= 60 km/h