The volume formula is πR? H+20ml, but it is concluded that the water in the container is 2CM away from the container mouth, and the water overflows 20ml after putting potatoes, so the volume of this potato is the radius of the container of 20CM, which can be counted as 2CM high and the water overflows 20ml, so the volume should be added with this 20ml volume, ml=cm? So the volume of potatoes is 3. 14 * 20 * 20 * 2+20 = 2532 cm?