The distance between City P and City Q was 810 km apart. A van travelled at an average speed of 92 km/h from City P to City Q. At the same time, a lorry travelled at an average speed of 70 km/h from City Q to City P. 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
= 92 + 70
= 162 km/h
Time taken for the van and the lorry to meet
= 810 ÷ 162
= 5 h
Difference in the speed between the van and the lorry
= 92 - 70
= 22 km/h
Distance that the van travelled further than the lorry
= 5 x 22
= 110 km
Answer(s): 110 km