### Home > CALC > Chapter 8 > Lesson 8.3.3 > Problem 8-123

8-123.

Pyramids have pointy tips. If the height is 10 inches, the base would start at *y* = 0.

Notice that the cross-sections are perpendicular to the *y*-axis, so set up and evaluate an integral in terms of *y*.

Use the eTool below to help solve the problem.

Click the link at right for the full version of the eTool: Calc 8-123 HW eTool