The distance between City T and City U was 660 km apart. A lorry travelled at an average speed of 83 km/h from City T to City U. At the same time, a bus travelled at an average speed of 82 km/h from City U to City T. 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
= 83 + 82
= 165 km/h
Time taken for the lorry and the bus to meet
= 660 ÷ 165
= 4 h
Difference in the speed between the lorry and the bus
= 83 - 82
= 1 km/h
Distance that the lorry travelled further than the bus
= 4 x 1
= 4 km
Answer(s): 4 km