A cylindrical tank has the dimensions shown. Use a formula to find the surface area of the tank. If one gallon of paint covers 140 ft squared, how many full gallons would you need to put two coats of paint on the entire surface of the tank? Use 3.14 for pi.
Radius = 5.5
Base = 16
Solve.
Surface Area of a Cylinder = 2πr(r + h), where r is the radius and h is the height of the cylinder.
Given that the radius (r) is 5.5 and the height (h) is 16, we can plug these values into the formula:
Surface Area = 2 * 3.14 * 5.5(5.5 + 16)
Surface Area = 2 * 3.14 * 5.5 * 21.5
Surface Area = 2 * 3.14 * 118.25
Surface Area = 741.86
To find out how many gallons of paint we would need to put two coats on the entire surface area, we divide the surface area by 140 ft^2, which is the coverage of one gallon of paint:
Total gallons needed = 741.86 / 140 ≈ 5.30 gallons
Therefore, we would need approximately 6 gallons of paint to put two coats on the entire surface of the tank.