#!/usr/bin/env python
# coding=utf-8

"""317. Firecracker
https://projecteuler.net/problem=317

A firecracker explodes at a height of 100 m above level ground. It breaks into
a large number of very small fragments, which move in every direction; all of
them have the same initial velocity of 20 m/s.

We assume that the fragments move without air resistance, in a uniform
gravitational field with g=9.81 m/s2.

Find the volume (in m3) of the region through which the fragments move before
reaching the ground. Give your answer rounded to four decimal places.
"""
