The distance between City X and City Y was 660 km apart. A bus travelled at an average speed of 95 km/h from City X to City Y. At the same time, a lorry travelled at an average speed of 70 km/h from City Y to City X. How much further did the bus travel than the lorry when the bus met the lorry on the way?
Combined speed of the bus and the lorry
= 95 + 70
= 165 km/h
Time taken for the bus and the lorry to meet
= 660 ÷ 165
= 4 h
Difference in the speed between the bus and the lorry
= 95 - 70
= 25 km/h
Distance that the bus travelled further than the lorry
= 4 x 25
= 100 km
Answer(s): 100 km