In the us, the fuel economy is measured in miles per gallon. in canada, the fuel economy is measured in liters per 100 km. if a car gets 30 miles per gallon, how many liters are needed per 100 km?

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.