A van and a Lamborghini started travelling from Town X to Town Y at the same time. After 6 hours, the Lamborghini reached Town Y while the van covered only ⁷₉ of the journey. The speed of the Lamborghini was 22 km/h more than the speed of the van. Find the speed of the van.
Extra distance covered by the Lamborghini in 6 h
= 6 x 22
= 132 km

When the Lamborghini reached Town Y:
Distance covered by the Lamborghini = 9 u
Distance covered by the van = 7 u

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

2 u = 132

1 u = 132 ÷ 2 = 66

Distance covered by the van when the Lamborghini reached Town Y
= 7 u
= 7 x 66
= 462 km

Speed of the van
= 462 ÷ 6
= 77 km/h

Answer(s): 77 km/h