Select the correct answer. A company needs to design an open-topped cylindrical drum that can hold 3.25 m3 of liquid. Its outer surface needs to be painted with an anticorrosive substance. The cost of painting its curved surface is $22/m2, while the cost of painting its bottom surface is $15/m2. Find the most economical dimensions of the cylinder so that the cost of painting it is minimum. A. r = 1.01 m and h = 1.01 m B. r = 1.27 m and h = 0.64 m C. r = 1.15 m and h = 0.78 m D. r = 1.23 m and h = 0.68 m