The height and radius of the right circular cone is 4 cm and 3 cm respectively. What is the total surface area of the cone?

12π cm2 24π cm2 7π cm2 16π cm2

24π cm2

We know that, l2 = r2 + h2 The total surface area of the cone  = πr(l + r) We have, Height = 4 cm Radius = 3 cm l2 = 42 + 32 l = \(\sqrt {16 + 9}\) = 5 cm Now, The total surface area of the cone = π × 3 × (5 + 3) = 24π cm2