Question: find the total surface area of the ice cream cone (include external and internal surfaces.) Take pi = $\displaystyle 22/7$

My solution: Basically what I did was to find slant height of both the internal and external cone and then evaluating it, find curved surface area for both internal and external + the circular area of the ice cream cone

Answer = $\displaystyle 113.2$cm (Round off 1 decimal place)

Is my answer right?

Thanks