Since you did not specify the direction of longitude, the country located at 20 degrees south latitude and 140 degrees east longitude is Australia, while the country located at 20 degrees south latitude and 140 degrees west longitude is France. The location is French Polynesia, which is a French territory.
The coordinates 20 degrees South and 140 degrees West lands somewhere between the islands of French Polynesia. The islands of French Polynesia are in the South Pacific Ocean.
20 S 20 W is in the South Atlantic Ocean.
20 S 100 E is in the Indian ocean, off the west coast of Australia.
South America
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Bolivia, Brazil, Chile, and Paraguay are the four South American countries through which the 20 degree south line of latitude passes. The 20 degree south line of latitude is 20 degrees south of the equator. It's called the 20th parallel south.One, it passes through Chile at 20 degrees South latitude and 70 degrees 7 minutes West longitude.Two, it passes through Boliva twice, at 20 degrees South latitude and 68 degrees 33 minutes West longitude; and at 20 degrees South latitude and 58 degrees 10 minuts West longitude.Three, it passes through Paraguay at 20 degrees South latitude and 61 degrees 53 minutes West longitude.Four, it passes through Brazil at 20 degrees South latitude and 57 degrees 52 minutes West longitude.
South Pacific Ocean
Atlantic Ocean close to northern south america
That's the Northern Territory of Australia.
Africa, Australia, and South America
Asia