A van and a Lamborghini started travelling from Town U to Town V at the same time. After 6 hours, the Lamborghini reached Town V while the van covered only ⁵₇ of the journey. The speed of the Lamborghini was 28 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 28
= 168 km

When the Lamborghini reached Town V:
Distance covered by the Lamborghini = 7 u
Distance covered by the van = 5 u

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

2 u = 168

1 u = 168 ÷ 2 = 84

Distance covered by the van when the Lamborghini reached Town V
= 5 u
= 5 x 84
= 420 km

Speed of the van
= 420 ÷ 6
= 70 km/h

Answer(s): 70 km/h