The distance between City K and City L was 770 km apart. A lorry travelled at an average speed of 80 km/h from City K to City L. At the same time, a convertible travelled at an average speed of 74 km/h from City L to City K. How much further did the lorry travel than the convertible when the lorry met the convertible on the way?
Combined speed of the lorry and the convertible
= 80 + 74
= 154 km/h
Time taken for the lorry and the convertible to meet
= 770 ÷ 154
= 5 h
Difference in the speed between the lorry and the convertible
= 80 - 74
= 6 km/h
Distance that the lorry travelled further than the convertible
= 5 x 6
= 30 km
Answer(s): 30 km