### Home > CALC > Chapter 1 > Lesson 1.2.1 > Problem1-23

1-23.

A semi-circular flag is shown attached to a "pole" at right.

1. Imagine rotating the flag about its pole and describe the resulting three-dimensional figure. Draw a picture of this figure on your paper.
$\text{volume of a sphere}=\frac{4}{3}\pi r^3$
Be careful! The radius of this sphere is not $6$.