The distance between City W and City X was 890 km apart. A car travelled at an average speed of 91 km/h from City W to City X. At the same time, a lorry travelled at an average speed of 87 km/h from City X to City W. 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
= 91 + 87
= 178 km/h
Time taken for the car and the lorry to meet
= 890 ÷ 178
= 5 h
Difference in the speed between the car and the lorry
= 91 - 87
= 4 km/h
Distance that the car travelled further than the lorry
= 5 x 4
= 20 km
Answer(s): 20 km