The distance between City H and City J was 640 km apart. A convertible travelled at an average speed of 90 km/h from City H to City J. At the same time, a van travelled at an average speed of 70 km/h from City J to City H. How much further did the convertible travel than the van when the convertible met the van on the way?
Combined speed of the convertible and the van
= 90 + 70
= 160 km/h
Time taken for the convertible and the van to meet
= 640 ÷ 160
= 4 h
Difference in the speed between the convertible and the van
= 90 - 70
= 20 km/h
Distance that the convertible travelled further than the van
= 4 x 20
= 80 km
Answer(s): 80 km