The distance between City M and City N was 800 km apart. A car travelled at an average speed of 85 km/h from City M to City N. At the same time, a lorry travelled at an average speed of 75 km/h from City N to City M. 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 + 75
= 160 km/h
Time taken for the car and the lorry to meet
= 800 ÷ 160
= 5 h
Difference in the speed between the car and the lorry
= 85 - 75
= 10 km/h
Distance that the car travelled further than the lorry
= 5 x 10
= 50 km
Answer(s): 50 km