The distance between City Y and City Z was 800 km apart. A lorry travelled at an average speed of 88 km/h from City Y to City Z. At the same time, a convertible travelled at an average speed of 72 km/h from City Z to City Y. How much further did the lorry travel than the convertible when the lorry met the convertible on the way?
Combined speed of the lorry and the convertible
= 88 + 72
= 160 km/h
Time taken for the lorry and the convertible to meet
= 800 ÷ 160
= 5 h
Difference in the speed between the lorry and the convertible
= 88 - 72
= 16 km/h
Distance that the lorry travelled further than the convertible
= 5 x 16
= 80 km
Answer(s): 80 km