## Comment: Re:Black holes are real, we observe them all the t (Score 1) 356

Just adding my own simple, non-calculus solution, to the mix.

When the radius of the earth is r we have...

Length of string around earth = 2*pi*r

Length of string around earth and poodle evenly = 2*pi(r + poodle)

Subtract former from the latter and it's 2*pi*r + 2*pi*poodle - 2*pi*r, so just 2*pi*poodle more.