The volume of a cone is 88 pi cubic feet. Its height is 6 feet. Singha is finding the diameter of the base of the cone. Her work is shown below. V = one-third pi r squared h. Step 1: 88 pi = one-third pi r squared (8). Step 2: 88 pi = 2 pi r squared. Step 3: 88 pi minus 2 pi = r squared. Step 4: 86 pi = r squared. Step 5: 16.44 = r. Step 6: 32.88 = diameter. What is Singha's error?