Yes, it’s from a book called “Uncle John’s Bathroom Reader” and that book was resting on a closed toilet seat in a nation that only kind of uses the metric system in certain situations… however, you’d be surprised how much you can learn after a single visit to any local fast-food joint!
Okay, a ball is equally wide but sometimes it gets squeezed and becomes tallish
Since it seems like you’re confused about the precise deformation of earth: the earth is wider around the equator. It’s not being squished but, rather, being flung apart by its spinning on its axis, like spinning pizza dough. Gravity just keeps it the same shape.
If you’re interested, look up “geodesy”