An auditorium has 20 large cylindrical columns. Each column has a height of 23 feet from the floor to the ceiling and a diameter of 1.7 feet.
How many gallons of paint must be purchased to paint these columns if each gallon of paint covers 350 feet²?
Use the value of π from your calculator or π ≈ 3.1416. Remember to round up because you cannot buy parts of a gallon.