The distance between City J and City K was 940 km apart. A lorry travelled at an average speed of 99 km/h from City J to City K. At the same time, a car travelled at an average speed of 89 km/h from City K to City J. How much further did the lorry travel than the car when the lorry met the car on the way?
Combined speed of the lorry and the car
= 99 + 89
= 188 km/h
Time taken for the lorry and the car to meet
= 940 ÷ 188
= 5 h
Difference in the speed between the lorry and the car
= 99 - 89
= 10 km/h
Distance that the lorry travelled further than the car
= 5 x 10
= 50 km
Answer(s): 50 km