The distance between City L and City M was 760 km apart. A lorry travelled at an average speed of 81 km/h from City L to City M. At the same time, a bus travelled at an average speed of 71 km/h from City M to City L. 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
= 81 + 71
= 152 km/h
Time taken for the lorry and the bus to meet
= 760 ÷ 152
= 5 h
Difference in the speed between the lorry and the bus
= 81 - 71
= 10 km/h
Distance that the lorry travelled further than the bus
= 5 x 10
= 50 km
Answer(s): 50 km