a circular pond has a diameter of 1.8m and a depth of 55cm. if we fill the pond with water, what is its volume

area = pi d^2/4 = (pi/4)(1.8)^2

volume = height*area = 0.55(pi/4)(1.8^2) m^3

To find the volume of a circular pond, we need to use the formula for the volume of a cylinder:

Volume = π * r^2 * h

Where:
- π is a mathematical constant approximately equal to 3.14159
- r is the radius of the circular base of the pond
- h is the height or depth of the pond

But before we can use the formula, we need to convert the diameter and depth to the appropriate units. The diameter of the pond is given as 1.8m, so the radius (r) can be calculated by dividing the diameter by 2:

r = 1.8m / 2 = 0.9m

The depth of the pond is given as 55cm. To use the formula, we need to convert this to meters by dividing by 100:

h = 55cm / 100 = 0.55m

Now, we can plug these values into the formula to calculate the volume:

Volume = π * (0.9m)^2 * 0.55m

Calculating this using a calculator or computer program:

Volume = 3.14159 * 0.9^2 * 0.55 ≈ 1.05949 cubic meters

Therefore, the volume of the pond is approximately 1.05949 cubic meters when filled with water.