What is the surface area of a circular wading pool with a diameter of 20 feet?

To determine the surface area of a circular wading pool, you can use the formula for the area of a circle, which is given by the equation A = πr², where A is the area and r is the radius.

First, you need to find the radius of the pool. The diameter provided in the question is 20 feet, which means the radius is half of that. So, the radius (r) is 10 feet.

Now, you can substitute the radius into the area formula:

A = π(10 feet)²

A = π(100 square feet)

Using the approximate value of π (3.14), you can calculate:

A ≈ 3.14 × 100 square feet

A ≈ 314 square feet

Thus, the surface area of the circular wading pool is approximately 314 square feet, which aligns with the first option.