The distance between City M and City N was 860 km apart. A convertible travelled at an average speed of 88 km/h from City M to City N. At the same time, a lorry travelled at an average speed of 84 km/h from City N to City M. 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
= 88 + 84
= 172 km/h
Time taken for the convertible and the lorry to meet
= 860 ÷ 172
= 5 h
Difference in the speed between the convertible and the lorry
= 88 - 84
= 4 km/h
Distance that the convertible travelled further than the lorry
= 5 x 4
= 20 km
Answer(s): 20 km