I took the geometric mean of three models implemented in Guesstimate, here.
One tried to work from how many people travel by train each day, one from the circumference of the earth, and one from how many packages are shipped each year.
Didn’t use Google for anything, assuming that was against the rules.
This is probably one of the weirdest guesstimates I’ve made in terms of approach. I’m sure there’s something easier.
Well, better a rough model than no model!
I took the geometric mean of three models implemented in Guesstimate, here.
One tried to work from how many people travel by train each day, one from the circumference of the earth, and one from how many packages are shipped each year.
Didn’t use Google for anything, assuming that was against the rules.
This is probably one of the weirdest guesstimates I’ve made in terms of approach. I’m sure there’s something easier.
Anyway, my final answer is 420 000 km.