460 km / 100 km/h = 4.6 hours of driving is needed to cover the distance. (deviding the distance by the
speed we have the time needed)
since the distance is 460 km , deviding by 30 we have 460/30 =15.33 so we need 15.33 liters of fuel to
cover the distance. check; 15.33 x 30 km = 460 km