the equation for volume is V=4/3 * pi * radius cubed.
Since we know 29 is the volume, the equation is 29=4/3 * pi * radius cubed.
To get the radius alone, first divide 29 by 4/3. You get 21 3/4 or 87/4 or 21.75 (whichever way).
Then divide 21.75 by pi (3.14). You get 6.92675159236
To get the radius alone, find the cubed root of 6.92675159236.
The answer is 1.90623543217, but I'd rounded to 1.91
