Respuesta :

MathPhys

Answer:

126π ≈ 395.8

Step-by-step explanation:

Including the bottom of the cone, the surface area is:

A = πr² + πrs

where r is the radius and s is the slant height.

A = π (6)² + π (6) (15)

A = 36π + 90π

A = 126π

A ≈ 395.8