Since Harry Potter ended a few years ago, most of the cast have moved on to more (or less) exciting projects.

Daniel Radcliffe is now starring in a new movie called “Horns”. The only thing interesting about the trailer is that “The Boy Who Lived” is now donning a pair of horns on his head similar to a goat on the prairie rather than the famous lightning-shaped scar.

Daniel’s horns extend in a cone shape. How can I find the surface area and volume of a cone? If the base radius and height of a cone are increased by 10%, can you tell me by how much the surface area and volume increase?