The distance between City J and City K was 720 km apart. A lorry travelled at an average speed of 95 km/h from City J to City K. At the same time, a bus travelled at an average speed of 85 km/h from City K to City J. How much further did the lorry travel than the bus when the lorry met the bus on the way?
Combined speed of the lorry and the bus
= 95 + 85
= 180 km/h
Time taken for the lorry and the bus to meet
= 720 ÷ 180
= 4 h
Difference in the speed between the lorry and the bus
= 95 - 85
= 10 km/h
Distance that the lorry travelled further than the bus
= 4 x 10
= 40 km
Answer(s): 40 km