Use the D=ST formula
Where Distance is Speed time Time
Convert the 150 min to hours by dividing by 60
= 2.5 Hours
Do the speed x the time now (in hours)
= 150 Km/h X 2.5 H
= 375
Distance must be Km because the speed was in Km/h
So... the distance the car has covered is 375 Km
Hope that helps you.