A bus and a Lamborghini started travelling from Town L to Town M at the same time. After 2 hours, the Lamborghini reached Town M while the bus covered only ⁵₇ of the journey. The speed of the bus was 22 km/h less than the speed of the Lamborghini. Find the speed of the Lamborghini.
Extra distance covered by the Lamborghini in 2 h
= 2 x 22
= 44 km

When the Lamborghini reached Town M:
Distance covered by the Lamborghini = 7 u
Distance covered by the bus = 5 u

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

2 u = 44

1 u = 44 ÷ 2 = 22

Distance covered by the Lamborghini when it reached Town M
= 7 u
= 7 x 22
= 154 km

Speed of the Lamborghini
= 154 ÷ 2
= 77 km/h

Answer(s): 77 km/h