The distance between City E and City F was 890 km apart. A convertible travelled at an average speed of 100 km/h from City E to City F. At the same time, a lorry travelled at an average speed of 78 km/h from City F to City E. 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
= 100 + 78
= 178 km/h
Time taken for the convertible and the lorry to meet
= 890 ÷ 178
= 5 h
Difference in the speed between the convertible and the lorry
= 100 - 78
= 22 km/h
Distance that the convertible travelled further than the lorry
= 5 x 22
= 110 km
Answer(s): 110 km