A lorry and a Lamborghini started travelling from Town S to Town T at the same time. After 4 hours, the Lamborghini reached Town T while the lorry covered only ⁵₈ of the journey. The speed of the lorry was 30 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 30
= 120 km

When the Lamborghini reached Town T:
Distance covered by the Lamborghini = 8 u
Distance covered by the lorry = 5 u

Extra distance covered by the Lamborghini 
= 8 u - 5 u
= 3 u

3 u = 120

1 u = 120 ÷ 3 = 40

Distance covered by the Lamborghini when it reached Town T
= 8 u
= 8 x 40
= 320 km

Speed of the Lamborghini
= 320 ÷ 4
= 80 km/h

Answer(s): 80 km/h