The distance between City D and City E was 760 km apart. A van travelled at an average speed of 80 km/h from City D to City E. At the same time, a lorry travelled at an average speed of 72 km/h from City E to City D. How much further did the van travel than the lorry when the van met the lorry on the way?
Combined speed of the van and the lorry
= 80 + 72
= 152 km/h
Time taken for the van and the lorry to meet
= 760 ÷ 152
= 5 h
Difference in the speed between the van and the lorry
= 80 - 72
= 8 km/h
Distance that the van travelled further than the lorry
= 5 x 8
= 40 km
Answer(s): 40 km