Final answer:
Lesotho is the country located at 30° S, 20° E. It is a landlocked country in Southern Africa and is known for its mountainous terrain.
Step-by-step explanation:
The country that you will find at 30° S, 20° E is Lesotho. Lesotho is a landlocked country located entirely within the borders of South Africa. It is one of three smaller landlocked states in Southern Africa. Lesotho is known for its mountainous terrain, with most of the land area being more than one mile in elevation.