A square has an area of 400 square miles. What is the length of each side of the square?

Solution:

Given a square has an area of 400 square miles.

Let A be the length of each side of the square.

We know that area of the square is  A² sq. units

Let us equate A² with 400 sq. units

⇒ A² = 400

⇒ A = 20 units

Therefore, the length of the side of the square is 20 units.

A square has an area of 400 square miles. What is the length of each side of the square?

Summary:

If a square has an area of 400 square miles then the length of each side of the square is 20units.