The distance between City M and City N was 990 km apart. A van travelled at an average speed of 88 km/h from City M to City N. At the same time, a lorry travelled at an average speed of 77 km/h from City N to City M. How much further did the van travel than the lorry when the van met the lorry on the way?
Combined speed of the van and the lorry
= 88 + 77
= 165 km/h
Time taken for the van and the lorry to meet
= 990 ÷ 165
= 6 h
Difference in the speed between the van and the lorry
= 88 - 77
= 11 km/h
Distance that the van travelled further than the lorry
= 6 x 11
= 66 km
Answer(s): 66 km