The distance between City R and City S was 880 km apart. A lorry travelled at an average speed of 99 km/h from City R to City S. At the same time, a bus travelled at an average speed of 77 km/h from City S to City R. 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
= 99 + 77
= 176 km/h
Time taken for the lorry and the bus to meet
= 880 ÷ 176
= 5 h
Difference in the speed between the lorry and the bus
= 99 - 77
= 22 km/h
Distance that the lorry travelled further than the bus
= 5 x 22
= 110 km
Answer(s): 110 km