The distance between City Y and City Z was 900 km apart. A lorry travelled at an average speed of 96 km/h from City Y to City Z. At the same time, a van travelled at an average speed of 84 km/h from City Z to City Y. 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
= 96 + 84
= 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
= 96 - 84
= 12 km/h
Distance that the lorry travelled further than the van
= 5 x 12
= 60 km
Answer(s): 60 km