Summary

1. surface area of a = πrl

2. Total Surfacesphere area of a circular cone = πrl + πr² = πr(l + r)

3. Surface area of a = 4πr²

4. Curved surface area of a = 2πr²

5. Total surface area of a = 3πr²

6. Volume of a = πr²h

7. Volume of a = πr³

8. Volume of a = πr³

[Here, letters l, b, h, a, r, etc. have been used in their usual meaning, depending on the context.]