The distance between City N and City P was 640 km apart. A bus travelled at an average speed of 85 km/h from City N to City P. At the same time, a van travelled at an average speed of 75 km/h from City P to City N. How much further did the bus travel than the van when the bus met the van on the way?
Combined speed of the bus and the van
= 85 + 75
= 160 km/h
Time taken for the bus and the van to meet
= 640 ÷ 160
= 4 h
Difference in the speed between the bus and the van
= 85 - 75
= 10 km/h
Distance that the bus travelled further than the van
= 4 x 10
= 40 km
Answer(s): 40 km