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Question

Buenos Aires and Montevideo are situated across the banks of _________.

This question was previously asked in
CDS I 2020 Elementary Mathematics Previous Year Paper (02-Feb-2020)
The correct answer is

River Plate

Understanding the Location of Buenos Aires and Montevideo

This question asks about the geographical feature that lies between two major South American cities, Buenos Aires and Montevideo. These cities are located on opposite banks of a significant body of water where a major river system meets the Atlantic Ocean.

Analyzing the Options

Let's look at the provided options and determine which body of water fits the description:

  • River Plate: Also known as the Río de la Plata, this is an estuary formed by the confluence of the Uruguay River and the Paraná River. It is located on the southeastern coast of South America.
  • Orinoco River: The Orinoco River is one of the longest rivers in South America, flowing through Venezuela and Colombia. It is located much further north than Buenos Aires and Montevideo.
  • Purus River: The Purus River is a tributary of the Amazon River, located in the Amazon basin in South America. This is far inland from the location of Buenos Aires and Montevideo.
  • Madeira River: The Madeira River is another major tributary of the Amazon River, also located within the Amazon basin. Like the Purus River, it is far inland and not near the location of the two cities.

Based on the geographical locations, the River Plate (Río de la Plata) is the only option that is situated between Buenos Aires, Argentina, and Montevideo, Uruguay.

Detailed Explanation of the River Plate

The River Plate is not strictly a river, but rather a funnel-shaped estuary, which is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. It is formed where the Uruguay River and the Paraná River meet and flow into the Atlantic Ocean.

Buenos Aires, the capital city of Argentina, is located on the southwestern bank of the River Plate. Montevideo, the capital city of Uruguay, is located on the northern bank of the River Plate.

Therefore, the two cities are indeed situated across the banks of the River Plate.

Geographical Context Table

Geographical Feature Location Relative to Buenos Aires and Montevideo Type of Water Body
River Plate (Río de la Plata) Between Buenos Aires (southwest bank) and Montevideo (north bank) Estuary
Orinoco River Far north (Venezuela/Colombia) River
Purus River Far inland (Amazon basin) River
Madeira River Far inland (Amazon basin) River

This confirms that the River Plate is the correct geographical feature separating the two cities.

Revision Table: Key Concepts

Term Definition/Relevance
Buenos Aires Capital city of Argentina, located on the River Plate.
Montevideo Capital city of Uruguay, located on the River Plate.
River Plate (Río de la Plata) Estuary forming the border and separating Buenos Aires and Montevideo.
Estuary A partially enclosed coastal body of brackish water where freshwater and saltwater mix.

Additional Information on the River Plate

The River Plate is one of the most important waterways in South America, serving as a crucial shipping channel for trade. Its basin is home to a large population and includes major ports like Buenos Aires and Montevideo. The size of the River Plate is immense; at its widest point, it is about 220 kilometers (137 miles) across, making it often described more like a sea than a river.

The confluence of the Paraná and Uruguay rivers creates the River Plate. The Paraná River is the second-longest river in South America, while the Uruguay River forms the border between Uruguay and Argentina in its lower course.

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