The distance between City J and City K was 900 km apart. A lorry travelled at an average speed of 97 km/h from City J to City K. At the same time, a van travelled at an average speed of 83 km/h from City K to City J. How much further did the lorry travel than the van when the lorry met the van on the way?
Combined speed of the lorry and the van
= 97 + 83
= 180 km/h
Time taken for the lorry and the van to meet
= 900 ÷ 180
= 5 h
Difference in the speed between the lorry and the van
= 97 - 83
= 14 km/h
Distance that the lorry travelled further than the van
= 5 x 14
= 70 km
Answer(s): 70 km