The distance between City U and City V was 780 km apart. A car travelled at an average speed of 85 km/h from City U to City V. At the same time, a lorry travelled at an average speed of 71 km/h from City V to City U. How much further did the car travel than the lorry when the car met the lorry on the way?
Combined speed of the car and the lorry
= 85 + 71
= 156 km/h
Time taken for the car and the lorry to meet
= 780 ÷ 156
= 5 h
Difference in the speed between the car and the lorry
= 85 - 71
= 14 km/h
Distance that the car travelled further than the lorry
= 5 x 14
= 70 km
Answer(s): 70 km