The distance between City X and City Y was 990 km apart. A convertible travelled at an average speed of 87 km/h from City X to City Y. At the same time, a bus travelled at an average speed of 78 km/h from City Y to City X. How much further did the convertible travel than the bus when the convertible met the bus on the way?
Combined speed of the convertible and the bus
= 87 + 78
= 165 km/h
Time taken for the convertible and the bus to meet
= 990 ÷ 165
= 6 h
Difference in the speed between the convertible and the bus
= 87 - 78
= 9 km/h
Distance that the convertible travelled further than the bus
= 6 x 9
= 54 km
Answer(s): 54 km