MathDB
Cutting a Cylindrical Log

Source:

December 26, 2006
geometryrectangle

Problem Statement

A cylindrical log has diameter 12 12 inches. A wedge is cut from the log by making two planar cuts that go entirely through the log. The first is perpendicular to the axis of the cylinder, and the plane of the second cut forms a 45 45^\circ angle with the plane of the first cut. The intersection of these two planes has exactly one point in common with the log. The number of cubic inches in the wedge can be expressed as nπ, n\pi, where n n is a positive integer. Find n. n.