You can put this solution on YOUR website! the speed of the car is 70km/h
i.e in 1 hr it goes 70km
or in 60 min it goes 70000m
or in 1 min it goes=70000/60=1166.667m
or in 60sec it goes 1166.667m
or in 1 sec it goes=1166.667/60=19.444 m=19.444/1000km=.019444km