Did United States of America and Brazil exist in the same era?

Yes, the two civilizations both existed around 1822 CE.

Which lasted longer, United States of America or Brazil?

United States of America lasted longer (250 years).

United States of America: Kuzey Amerika; Brazil: Güney Amerika

United States of America (1776 CE – present) and Brazil (1822 CE – present) lived in the same era.

	United States of America	Brazil
Period	1776 CE – present	1822 CE – present
Duration	250 years	204 years
Region	Kuzey Amerika	Güney Amerika
Capital	Washington D.C.	—
Type	Republic	Country
Government	Federal Başkanlık Cumhuriyeti	Cumhuriyet
Religion	Hristiyanlık (çeşitli)	—
Language	İngilizce	—
Peak population	331,000,000	211,049,527
Rulers	20	38

The world's first modern democratic republic. With its superpower status, the most influential state of the 20th and 21st centuries.

Federative Republic of Brazil · South America

Did United States of America and Brazil exist in the same era?: Yes, the two civilizations both existed around 1822 CE.
Which lasted longer, United States of America or Brazil?: United States of America lasted longer (250 years).
Which regions did United States of America and Brazil rule?: United States of America: Kuzey Amerika; Brazil: Güney Amerika