Find the area of a circle whose radius is 3.1.

We are given a circle with a radius of 3.1 units. We need to find the area of a circle with a given radius.

Let’s remember the formula for finding the area of a circle through the radius.

S = πR ^ 2, where π is a constant whose value is 3.14, R is the radius of the circle.

It remains for us to substitute the values of the radius and the number π in the formula, and make calculations.

S = 3.14 * 3.1 ^ 2 = 3.14 * 9.61 = 6.47 sq. units.

So, the area of a circle with a radius of 3.1 is 6.47 square meters. units.

Answer: 6.47 sq. units is the area of a circle with a radius of 3.1 units.