find the total surface area of cone whose radius is 2r and slant height is 2L - Maths - Surface Areas and Volumes

Question

find the total surface area of cone whose radius is 2r and slant
height is 2L

Nihitha · Accepted Answer

radius of the cone = 2r
slant height of the cone = 2l
T S A = ?
total surface area of a cone = πr(l+r)
= π X 2r (2l + 2r)
= 2πr X 2(l+r)
= 4πr(l+r)