The distance between City L and City M was 960 km apart. A van travelled at an average speed of 90 km/h from City L to City M. At the same time, a lorry travelled at an average speed of 70 km/h from City M to City L. 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
= 90 + 70
= 160 km/h
Time taken for the van and the lorry to meet
= 960 ÷ 160
= 6 h
Difference in the speed between the van and the lorry
= 90 - 70
= 20 km/h
Distance that the van travelled further than the lorry
= 6 x 20
= 120 km
Answer(s): 120 km