IOM 2018, Блиц, английски — Задача 24

OLYMPIAD OF METROPOLISES. Moscow, September 3 · 3 септември 2018 г.

Условие

Three balls of radius $2\sqrt{6} - 3$ are placed on the table with each ball touching the other two. The fourth ball with the same radius is placed above them so that it touches the first three ones. What is the height of the center of the fourth ball above the table?

Отговори

Решение

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Оригинал в Архива: blitz.pdf · официални решения: blitz-answers.pdf