Solve the below problem:
Q: A marker for a garden path consists of a truncated regular pyramid carved from stone of density 2570 kg/m3. The pyramid is mounted on a steel base of thickness h. Knowing that the density of steel is 7860 kg/m3 and that steel plate is available in 5-mm increments, specify the minimum thickness h for which the center of gravity of the marker is approximately 300 mm above the top of the base.
