Question

Rectangle ABCD with height h and width w is rotated 360° about segment ADAD. Which choice gives the solid formed and its surface area?

Answer 1

A = 2π • w • h + 2π • W

:D

Answer 2

This will give us a cylinder with s surface area of A = 2π • w • h + 2π • w to the second power square units. A right circular hollow cylinder is a 3D region enclosed by two right circular cylinders having the same axis and two parallel annular bases perpendicular to the cylinders' common axis which will be formed when you rotate the given by 360 degrees.