The distance between City R and City S was 720 km apart. A car travelled at an average speed of 99 km/h from City R to City S. At the same time, a bus travelled at an average speed of 81 km/h from City S to City R. How much further did the car travel than the bus when the car met the bus on the way?
Combined speed of the car and the bus
= 99 + 81
= 180 km/h
Time taken for the car and the bus to meet
= 720 ÷ 180
= 4 h
Difference in the speed between the car and the bus
= 99 - 81
= 18 km/h
Distance that the car travelled further than the bus
= 4 x 18
= 72 km
Answer(s): 72 km