https://decimal-to-binary.com/ploschad-us-konus.html?id=13

The area of the lateral surface of a truncated cone with the radius of the lower base R = 2, with the radius of the upper base r = 2, and the generative L = 2 equal to 25.132

What needs to be found:
Radius R: Radius r: Forming L:

truncated cone

A truncated cone is a part of a cone located between its base and a secant plane parallel to the base.
The formula of the area of the lateral surface of the cone Formula for the area of the lateral surface of a truncated cone truncated cone where R is the radius of the lower base,r is the radius of the upper base, L is the length of the generatrix.

Solution:
S = πL·(R+r)
= π·2·(2+2)
= π·2·4
= 8·π
=
25.132

a: The area of the lateral surface of a truncated cone with the radius of the lower base R = 2, with the radius of the upper base r = 2, and the generative L = 2 equal to 25.132