MathDB
Putnam 1938 A1

Source:

August 20, 2021
Putnam

Problem Statement

A solid in Euclidean 33-space extends from z=h2z = \frac{-h}{2} to z=+h2z = \frac{+h}{2} and the area of the section z=kz = k is a polynomial in kk of degree at most 33. Show that the volume of the solid is h(B+4M+T)6,\frac{h(B + 4M + T)}{6}, where BB is the area of the bottom (z=h2)(z = \frac{-h}{2}), MM is the area of the middle section (z=0),(z = 0), and TT is the area of the top (z=h2)(z = \frac{h}{2}). Derive the formulae for the volumes of a cone and a sphere.