A van and a Lamborghini started travelling from Town Y to Town Z at the same time. After 5 hours, the Lamborghini reached Town Z while the van covered only ⁵₇ of the journey. The speed of the van was 26 km/h less than the speed of the Lamborghini. Find the speed of the Lamborghini.
Extra distance covered by the Lamborghini in 5 h
= 5 x 26
= 130 km

When the Lamborghini reached Town Z:
Distance covered by the Lamborghini = 7 u
Distance covered by the van = 5 u

Extra distance covered by the Lamborghini 
= 7 u - 5 u
= 2 u

2 u = 130

1 u = 130 ÷ 2 = 65

Distance covered by the Lamborghini when it reached Town Z
= 7 u
= 7 x 65
= 455 km

Speed of the Lamborghini
= 455 ÷ 5
= 91 km/h

Answer(s): 91 km/h