Joe and mel are trying to determine whose car they should take down to las vegas (563 miles away). joe’s tricked out nissan sentra coupe gets 28 miles per gallon, while mel’s cayman porsche gets uses an average of 10 liters for every 100 km.

Even though the porshe would be more fun the nissan is more economical. Convert the liters to gallons and the kilometers to miles. Then divide the miles by the gallons. There are 3.79 liters in a gallon and 1.6 kilometers in a mile. 10 liters equals 2.64 gallons and 100 km equals 62 miles. The porshe gets about 23mpg.