The volume of a cylinder is, pi*r^2^h, so we know that the height and radius is 10 and 20 cm,
We can square 10 to get 100pi. then 100pi*20 would be our volume of the cylinder.
The maximum error in y calculation? Perhaps check out this link, I'm not sure what your trying to ask.
https://www.freemathhelp.com/forum/threads/maximum-error-in-calculated-surface-area-volume-of-sphere.60934/ - Sphere