The distance between City W and City X was 990 km apart. A lorry travelled at an average speed of 93 km/h from City W to City X. At the same time, a convertible travelled at an average speed of 72 km/h from City X to City W. 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
= 93 + 72
= 165 km/h
Time taken for the lorry and the convertible to meet
= 990 ÷ 165
= 6 h
Difference in the speed between the lorry and the convertible
= 93 - 72
= 21 km/h
Distance that the lorry travelled further than the convertible
= 6 x 21
= 126 km
Answer(s): 126 km