The distance between City K and City L was 640 km apart. A van travelled at an average speed of 89 km/h from City K to City L. At the same time, a bus travelled at an average speed of 71 km/h from City L to City K. How much further did the van travel than the bus when the van met the bus on the way?
Combined speed of the van and the bus
= 89 + 71
= 160 km/h
Time taken for the van and the bus to meet
= 640 ÷ 160
= 4 h
Difference in the speed between the van and the bus
= 89 - 71
= 18 km/h
Distance that the van travelled further than the bus
= 4 x 18
= 72 km
Answer(s): 72 km