The distance between City F and City G was 810 km apart. A convertible travelled at an average speed of 85 km/h from City F to City G. At the same time, a lorry travelled at an average speed of 77 km/h from City G to City F. How much further did the convertible travel than the lorry when the convertible met the lorry on the way?
Combined speed of the convertible and the lorry
= 85 + 77
= 162 km/h
Time taken for the convertible and the lorry to meet
= 810 ÷ 162
= 5 h
Difference in the speed between the convertible and the lorry
= 85 - 77
= 8 km/h
Distance that the convertible travelled further than the lorry
= 5 x 8
= 40 km
Answer(s): 40 km