The distance between City G and City H was 860 km apart. A lorry travelled at an average speed of 90 km/h from City G to City H. At the same time, a van travelled at an average speed of 82 km/h from City H to City G. 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
= 90 + 82
= 172 km/h
Time taken for the lorry and the van to meet
= 860 ÷ 172
= 5 h
Difference in the speed between the lorry and the van
= 90 - 82
= 8 km/h
Distance that the lorry travelled further than the van
= 5 x 8
= 40 km
Answer(s): 40 km