The distance between City U and City V was 880 km apart. A lorry travelled at an average speed of 98 km/h from City U to City V. At the same time, a bus travelled at an average speed of 78 km/h from City V to City U. 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
= 98 + 78
= 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
= 98 - 78
= 20 km/h
Distance that the lorry travelled further than the bus
= 5 x 20
= 100 km
Answer(s): 100 km