Answer:
1.67 quarts
Step-by-step explanation:
For a cylinder of radius r and height h, the lateral area is ...
LA = 2πrh
The area of one end is ...
A = πr²
Then the total surface area of the side of the cylinder and one end is ...
S = LA +A = πr(2h+r)
For the given dimensions, the area to be painted is ...
S = π(0.5)(2·4 +0.5) = 4.25π ≈ 13.352 . . . . square feet
If one quart paints 8 ft², then the number of quarts of paint needed is ...
(13.352 ft²)/(8 ft²/qt) = 1.67 qt
Marek will need about 1.67 quarts of paint for his cylinder.
