how do you find the formula for cone

Volume of a cone  = [pi*r^2*h ]/ 3    where r is the radius and h is the height

Surface Area of a cone  = ( pi * r * √[r^2 + h^2] )  = pi * r * l       where l is the slant height = √[r^2 + h^2] 

Surface area or volume or what?

the quickest way to get an answer like this is to google it but you have to know what you want.