Question

A tin man has a head that is a cylinder with a cone on top. The height of the cylinder is 12 inches and the slant height of the cone is 6 inches. The radius of both the cylinder and the cone is 4 inches. What is the surface area of the tin man's head in terms of pi?

A) 136π in2
B) 152π in2
C) 168π in2
D) 172π in2

Answer 1

the cylindar wall = circumference * height = (2pi)(4)(12)
the cone = 1/2 circumference * slant height = 1/2 (2pi (4) * 6)