A lorry and a Lamborghini started travelling from Town B to Town C at the same time. After 5 hours, the Lamborghini reached Town C while the lorry covered only ⁷₁₀ of the journey. The speed of the Lamborghini was 24 km/h more than the speed of the lorry. Find the speed of the lorry.
Extra distance covered by the Lamborghini in 5 h
= 5 x 24
= 120 km

When the Lamborghini reached Town C:
Distance covered by the Lamborghini = 10 u
Distance covered by the lorry = 7 u

Extra distance covered by the Lamborghini 
= 10 u - 7 u
= 3 u

3 u = 120

1 u = 120 ÷ 3 = 40

Distance covered by the lorry when the Lamborghini reached Town C
= 7 u
= 7 x 40
= 280 km

Speed of the lorry
= 280 ÷ 5
= 56 km/h

Answer(s): 56 km/h