A lorry and a Lamborghini started travelling from Town N to Town P at the same time. After 2 hours, the Lamborghini reached Town P while the lorry covered only ⁷₉ of the journey. The speed of the Lamborghini was 16 km/h more than the speed of the lorry. Find the speed of the lorry.
Extra distance covered by the Lamborghini in 2 h
= 2 x 16
= 32 km

When the Lamborghini reached Town P:
Distance covered by the Lamborghini = 9 u
Distance covered by the lorry = 7 u

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

2 u = 32

1 u = 32 ÷ 2 = 16

Distance covered by the lorry when the Lamborghini reached Town P
= 7 u
= 7 x 16
= 112 km

Speed of the lorry
= 112 ÷ 2
= 56 km/h

Answer(s): 56 km/h