The distance between City S and City T was 900 km apart. A bus travelled at an average speed of 93 km/h from City S to City T. At the same time, a lorry travelled at an average speed of 87 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
= 93 + 87
= 180 km/h
Time taken for the bus and the lorry to meet
= 900 ÷ 180
= 5 h
Difference in the speed between the bus and the lorry
= 93 - 87
= 6 km/h
Distance that the bus travelled further than the lorry
= 5 x 6
= 30 km
Answer(s): 30 km