In situations where the distance between two points is large but the goods are light,a combination of air and road transportation is the most efficient. Air transport provides quick delivery over long distances, while road transport ensures the goods can be delivered to the final destination.
On the day of her examination, Riya sharpened her pencil from both ends as shown below. 
The diameter of the cylindrical and conical part of the pencil is 4.2 mm. If the height of each conical part is 2.8 mm and the length of the entire pencil is 105.6 mm, find the total surface area of the pencil.