The country which is 10° South and 25° East is Democratic Republic of the Congo.
Step-by-step explanation:
This country is located in Central Africa and the capital of the country is Kinshasa. Kinshasa is not just the capital of Democratic Republic of the Congo but also the largest city of the country.
Democratic Republic of the Congo is the 11th largest country in the world with a massive population of over 8.4 billion people (which is the fourth most populous country in Africa).