What Is The Diameter Of The Earth In Miles

[silver60]

curious

[fiction-factory]

roughly 26000 divided by pi. But it's not an exact sphere

[alavahalf]

Approximately 3963 miles at the equator ..

[dannyk13]

Answer here:-
https://www.universetoday.com/15055/diameter-of-earth/

[alavahalf]

Whoops that was the radius .. therefore twice 3963

[fiction-factory]

apparently circumference at the equator is 25000 miles not 26000 miles as I misremembered it.

[bhg481]

It always tickles me that the metre was originally defined as the distance from the north pole to the equator via Paris (=10,000,000 metres). The gram was defined as 1cc of water. Unfortunately they got the measurement wrong, so the whole metric system is based on a cock-up.

[Prudie]

Going back years and a foggy memory I think at school when we were covering latitude and longitude and working out travel on the globe surface using pi and circle geometry we had to assume radius of the earth was 3960 miles, it made things easier as divisible by 360 - that maybe a false memory :-)

[Peter Pedant]

we should all be in metric as
the kilometre is 1 / 10000 th of a quadrant
by definition

ie 40, 000 divided by pi times that do-do factor for km into miles ( 0.6)

[dannyk13]

From the link^^^
//the Earth has an equatorial diameter of 12,756 km (7926 mi), and a polar diameter of 12713.6 km (7899.86 mi).//

[Zacs-Master]

Glad that’s cleared things up.

[Peter Pedant]

//whole metric system is based on a cock-up.//
and the kilogramme was a kilogramme of splock
(er Pt actually but this is AB and I dont want to be too er brainy) - splock den - and it took up gas ( adsorbed but you know ... AB and all that.) and so got heavier

Jesus I remember having to do Maff Ao level ( addl maff) in foot-pound-second, aaaargh torture .... ( 1965 )

[fiction-factory]

All this assumes the earth isn't flat...

[Peter Pedant]

yeah free T might say
o gawd - call it four farsand and lets get back to brexit !

[Zacs-Master]

It can’t be flat otherwise cats would have knocked everything off the edge.

[Peter Pedant]

it isnt an assumption - it is a conclusion actually
( earth - flat n all dat)

[bhg481]

Peter - the Imperial system is easier to understand than some of your posts.

[Baldric]

The diameter of the Earth at the equator is 43 kilometres (27 mi) larger than the pole-to-pole diameter. Thus the point on the surface farthest from Earth's center of mass is the summit of the equatorial Chimborazo volcano in Ecuador. The average diameter of the reference spheroid is 12,742 kilometres (7,918 mi).

[Zacs-Master]

LOL at bhg.

[Peter Pedant]

// Peter - the Imperial system is easier to understand than some of your posts.//

chrissakes: the diameter of the earth is four thousand miles ( nearly ) shouldnt tax the brains of even the most average usual suspect. Measure up man!

[Zacs-Master]

I haven’t got a tape long enough.