A van and a Lamborghini started travelling from Town J to Town K at the same time. After 4 hours, the Lamborghini reached Town K while the van covered only ⁷₉ of the journey. The speed of the van was 24 km/h less than the speed of the Lamborghini. Find the speed of the Lamborghini.
Extra distance covered by the Lamborghini in 4 h
= 4 x 24
= 96 km

When the Lamborghini reached Town K:
Distance covered by the Lamborghini = 9 u
Distance covered by the van = 7 u

Extra distance covered by the Lamborghini 
= 9 u - 7 u
= 2 u

2 u = 96

1 u = 96 ÷ 2 = 48

Distance covered by the Lamborghini when it reached Town K
= 9 u
= 9 x 48
= 432 km

Speed of the Lamborghini
= 432 ÷ 4
= 108 km/h

Answer(s): 108 km/h