The answer is 21.2 ft²To do this we need to calculate the volume of the cylinder shaped drum.The volume (V) of the cylinder with height h and radius r is:V = π r² hWe have:π = 3.14r = 1.5 fth = 3 ftTherefore:V = π r² hV = 3.14 * (1.5 ft)² * 3 ftV = 21.2 ft²