Mathematics for IGCSE & O level - Mensuration (Section 1 - No. 2)
Which formulas are needed to calculate the surface area of a cone?
πr²
2πrh
πrl
πrh
ব্যাখ্যা
The total surface area of a cone includes the base area and the curved surface area: base area (πr²) and curved surface area (πrl).