Two reagents that can be used to remove ballpoint pen stains are:
1. Rubbing alcohol – It helps dissolve ink stains from the fabric.
2. Hair spray – The alcohol content in hair spray can help break down the ink stain.
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.