# silo

## 58 - 59 Maxima and minima: cylinder surmounted by hemisphere and cylinder surmounted by cone

## 56 - 57 Maxima and minima problems of square box and silo

**Problem 56**

The base of a covered box is a square. The bottom and back are made of pine, the remainder of oak. If oak is m times as expensive as pine, find the most economical proportion.