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Home > MC2 > Chapter 10 > Lesson 10.2.6 > Problem 10-146

10-146.

Find the volume of the cone shown in problem 10-142.  

From problem 10-142, you learned that the volume of a cone is one-third the volume of a cylinder with the same base area and height.

The equation for the volume of a cylinder is:

So the volume of a cone is:

The base is a circle with a radius of 6 inches. So using the equation for area of a circle:

The height of the cylinder is inches. Substitute the known values into the volume equation for a cone:

Now simplify to get the answer.