The distance between City S and City T was 640 km apart. A bus travelled at an average speed of 88 km/h from City S to City T. At the same time, a lorry travelled at an average speed of 72 km/h from City T to City S. 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
= 88 + 72
= 160 km/h
Time taken for the bus and the lorry to meet
= 640 ÷ 160
= 4 h
Difference in the speed between the bus and the lorry
= 88 - 72
= 16 km/h
Distance that the bus travelled further than the lorry
= 4 x 16
= 64 km
Answer(s): 64 km