# How to Calculate the Area of a Circular Cistern Base?

## What is the formula to find the area of a circular base?

Given a circular cistern with a radius of 2.1 meters, how can we calculate the area of its base?

## Formula to Calculate the Area of a Circular Base

To find the area of a circular base, we use the formula A = πr^{2}, where A is the area and r is the radius of the circle.

When calculating the area of a circular cistern base, the first step is to determine the radius of the circle. In this case, the radius is given as 2.1 meters. Using the formula A = πr^{2}, we can plug in the values to find the area:

A = π(2.1)^{2} = π(4.41) ≈ 13.85 square meters

Therefore, the area of the circular base of the cistern is approximately 13.85 square meters. This calculation helps us understand the size of the base and is essential for various engineering and construction purposes.