The distance between City C and City D was 960 km apart. A bus travelled at an average speed of 87 km/h from City C to City D. At the same time, a lorry travelled at an average speed of 73 km/h from City D to City C. 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
= 87 + 73
= 160 km/h
Time taken for the bus and the lorry to meet
= 960 ÷ 160
= 6 h
Difference in the speed between the bus and the lorry
= 87 - 73
= 14 km/h
Distance that the bus travelled further than the lorry
= 6 x 14
= 84 km
Answer(s): 84 km