Question

If every gallon of gasoline produces 20 pounds of carbon dioxide when burned, and a certain traditional car emits 74.9 pounds of carbon dioxide every 100 miles, how many gallons of gasoline does this car use for 100 miles?

Answer 1

Every gallon of gasoline produces 20pounds of carbon(iv)oxide.
The car emits 74.9pounds of carbon(iv) oxide every 100miles.
Therefore to get the number of gallons we divide 74.9 by 20...which is 74.9/20= 3.745
Since we cannot have a fraction of a gallon then the total gallons will be equal to 4.