How many tennis balls, lined up one after the other, would it take to circle the earth at the Equator?

The beauty of wolfram. (Except for the fail of URLs sometimes.)
http://goo.gl/JLaFf

hmm i’m not sure how to use wolfram correctly…
what’s the answer @phoebusg?

Are these new fuzzy florescent yellow tennis balls with fresh nap, or the old beat up green flat tennis balls that my dog chews on?

I get 598,000,000 tennis balls. Right?

@pallen123

From what I saw at the linked Wolfram page, the answer is 1.9X10^8 (190,000,000) tennis balls.

@Brian1946 @phoebusg I think 190000000 is diameter. 598000000 is circumference right? Anyone know where I can buy that many balls? I’m doing a “project”.

@pallen123

I calculate about 600,501,493 balls using a circumference of 25,000 miles and a diameter of about 2.6” for the balls.

Only ten if these tennis balls were huge, each having a diameter of 2,500 miles.

Yeah, @pallen123 you got it right. I used the wrong term, but still: http://goo.gl/HITrO

Thank you all.

However many it is, it isn’t enough to satisfy my golden retriever!

I was just gonna say “all of them” but you guys got all techie.

@AstroChuck 10 wouldn’t be enough, because they would all have centers 1250 miles above the Earth, changing the circumference.

@phoebusg That wolfram site is awesome! GA for you!

@cockswain- Then perhaps 2,500 tennis balls with a diameter of 10 miles?

It’s called cross multiplications and rule of three. Works for anything. Not just tennis balls and planets. Let’s make it a bit more complicated. How many tennis balls fit inside of Earth? No squeezing. So there’s room between the balls too.

@mattbrowne ; More than all of them?

@JilltheTooth – Correct answer.