### Home > APCALC > Chapter 4 > Lesson 4.1.1 > Problem 4-12

4-12.

Khi thinks that when the flags at right are rotated, the

Decide if Khi is correct. If he is incorrect, explain the error in his logic.

Start by visualizing the terms in Khi's equation: What does Volume and Volume

*look like? What does Volume*

Volume is cone with radius

*is a cylinder with radius*

Try computing the volume of each:

Evaluate and compare.

Volume

Use the eTool below to visualize this problem.

Click on the link to the right to view the full version of the eTool: *Calc 4-12 eTool*