......
20,000km = 2e7 meters a 2m accuracy requires 2/2e7 = 1part in 10,000,000
=0.00001% accuracy
keywords: uncertainty,of,percent,we,distance,km,accuracy,How,to,for,desire,20000,if,calculate,meter,the,How to calculate the percent accuracy for the distance of 20000 km if we desire a 2-meter uncertainty
