The more surface area an ice cube has, the more quickly it melts to cool a beverage. Mark states that the ideal ice cube would be a prism that is a perfect cube of dimensions 2 by 2 by 2. Denise thinks that the prism should be more flat, with dimensions of 1 by 2 by 4. Which rectangular prism gives the greatest surface area, making for a better ice cube? Mark’s cube will have the greatest surface area. The two prisms will have the same surface area. There is no way to calculate the surface area of each prism. Denise’s prism will have the greatest surface area.