### Home > APCALC > Chapter 1 > Lesson 1.2.3 > Problem 1-60

1-60.

When the semi-circular flag below is rotated, it has a volume of *π *un^{3}. Homework Help ✎

Describe the resulting three-dimensional figure

Use the eTool below to visualize the rotating flag.

Click the link at right for the full version of the eTool: Calc 1-60 HW eToolWhat is the value of

*d*?If the diagram is rotated 90º and the flag is then rotated about a horizontal pole, will the volume change?

Build a model by taping a paper flag to a pencil. Try holding the pencil in different positions. Does the size or shape of the resultant solid change when the pencil is held horizontally vs. vertically?