I forgot the formula to find the area of a cone. Help.
It is quicker just to google things like this :)
https://www.google.com.au/search?q=surface+area+of+a+cone&ie=utf-8&oe=utf-8&gws_rd=cr&ei=Nb4jVZmCO5Di8AWIpoD4CA
The area of a cone=pi x radius x length of slope