CPM Homework Help : CC2MN Problem 11-64

Find the volume of the cone.

Hint:

Volume of a cone $= \frac{1}{3}\left(\pi \; \cdot \; {\it r}^2\right)\left(\text{height}\right)$

Substitute the values given in the diagram.

Answer:

$\frac{1280\pi }{3}\approx 1340.41 \text{ in}.^3$

An upside down cone, with a dashed line drawn from the top vertex, to the middle of the circle, labeled 20 inches, then turning 90 degrees, and going to the edge of the circle, labeled 8 inches.