# README
Sphere Packing
What is the length of the shortest pipe, of internal radius $50$mm, that can fully contain $21$ balls of radii $30$mm, $31$mm, ..., $50$mm?
Give your answer in micrometres ($10^{-6}$ m) rounded to the nearest integer.
What is the length of the shortest pipe, of internal radius $50$mm, that can fully contain $21$ balls of radii $30$mm, $31$mm, ..., $50$mm?
Give your answer in micrometres ($10^{-6}$ m) rounded to the nearest integer.