Three ways to simplify food preparation and serving for Mrs. and Mr. Kumar are:
1. Pre-preparation of Ingredients – Chop, chop, and prepare ingredients in advance to save time during cooking.
2. Batch Cooking – Prepare food in large quantities and store it in portions to serve easily when guests arrive.
3. Set Up Buffet Style – Instead of serving food individually, set up a buffet where guests can serve themselves, reducing the need for serving each person.
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.