The distance between City R and City S was 830 km apart. A bus travelled at an average speed of 89 km/h from City R to City S. At the same time, a lorry travelled at an average speed of 77 km/h from City S to City R. 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
= 89 + 77
= 166 km/h
Time taken for the bus and the lorry to meet
= 830 ÷ 166
= 5 h
Difference in the speed between the bus and the lorry
= 89 - 77
= 12 km/h
Distance that the bus travelled further than the lorry
= 5 x 12
= 60 km
Answer(s): 60 km