A bus and a Lamborghini started travelling from Town S to Town T at the same time. After 5 hours, the Lamborghini reached Town T while the bus covered only ⁷₉ of the journey. The speed of the bus was 16 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 16
= 80 km

When the Lamborghini reached Town T:
Distance covered by the Lamborghini = 9 u
Distance covered by the bus = 7 u

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

2 u = 80

1 u = 80 ÷ 2 = 40

Distance covered by the Lamborghini when it reached Town T
= 9 u
= 9 x 40
= 360 km

Speed of the Lamborghini
= 360 ÷ 5
= 72 km/h

Answer(s): 72 km/h