The diameter of the base and the slant height of a right circular cone are 10 cm and 16 cm, respectively. Find its total surface area. [Use $π =\frac{22}{7}]$
Answer & explanation
Correct answer: option 3
We know that,
Formula of Total surface area of a cone = πr(l + r)
We have,
Diameter = 10 cm
Then the radius of the cone = \(\frac{ 10}{2}\) = 5 cm
Total surface area of cone = πr(l + r) = 5 × \(\frac{22}{7}\)× (16 + 5) = 330 cm²