Hazardous materials are substances that pose a risk to health, safety, or the environment. These materials must be stored in approved containers to prevent accidents, and they must be kept away from ignition sources to avoid the risk of fire or explosion.
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.