This post continues my effort to write up solutions (aimed at students) to the problems on this year’s Putnam exam. Here is problem B2:

## On 2012 Putnam problem B2

**Tagged**Lagrange multiplier, polygon, polyhedron, problem B2, volume of a sphere

This post continues my effort to write up solutions (aimed at students) to the problems on this year’s Putnam exam. Here is problem B2: