The distance between City W and City X was 820 km apart. A lorry travelled at an average speed of 94 km/h from City W to City X. At the same time, a van travelled at an average speed of 70 km/h from City X to City W. 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
= 94 + 70
= 164 km/h
Time taken for the lorry and the van to meet
= 820 ÷ 164
= 5 h
Difference in the speed between the lorry and the van
= 94 - 70
= 24 km/h
Distance that the lorry travelled further than the van
= 5 x 24
= 120 km
Answer(s): 120 km