When a gasoline container is 40% empty, it contains 35 liters more gasoline than when it is 40% full. What is the capacity of the gasoline container in liters?
Let the capacity of the container = C
When 40% empty = 60% full
60%C - 40%C =20%C
20%C = 35 liters
Divide both sides by 20%
C =35 liters / 20%
C = 175 liters - capacity of the container.