Question 1029308
Surface area of a cone is,
{{{SA=pi*r*(r+sqrt(h^2+r^2))}}}
{{{SA=pi*(27/2)*(27/2+sqrt(12^2+(27/2)^2))}}}
{{{SA=pi*(27/2)*(27/2+(3/2)sqrt(145))}}}
{{{SA=(81/4)pi*(9+sqrt(145))}}}