Mark Rober's 'Craziest Fact' EXPLAINED

The problem: Add one foot to the radius or Earth and how much greater is the circumference?
In this video, Mr. Hamilton explains how to calculate this difference in circumference and two reasons why most people are so wrong!
For the introduction to this, see this TH-cam Short: • SURPRISED!!! by Mark R...

[@mechanismguy]

I think what is surprising about it is that the answer doesn’t depend on the size (radius) so you get the same answer for a basketball and for Earth.