Answer:
The actual area of the garden is 1256 square feet.
Step-by-step explanation:
Given:
A gardener is designing a circular garden.
On the blueprint, the garden has a diameter of 16 centimeters.
The blueprint has a scale of two centimeters to five feet.
Now, to find the actual area of the garden.
Let the actual diameter of the garden be ![x\ feet.](https://tex.z-dn.net/?f=x%5C%20feet.)
And the diameter of the garden on blueprint = ![16\ centimeters.](https://tex.z-dn.net/?f=16%5C%20centimeters.)
As, given:
The blueprint has a scale of two centimeters to five feet.
2 centimeters is equivalent to 5 feet.
Thus, 16 centimeters is equivalent to ![x\ feet.](https://tex.z-dn.net/?f=x%5C%20feet.)
Now, to get the actual diameter by using cross multiplication method:
![\frac{2}{5} =\frac{16}{x}](https://tex.z-dn.net/?f=%5Cfrac%7B2%7D%7B5%7D%20%3D%5Cfrac%7B16%7D%7Bx%7D)
By cross multiplying we get:
![2x=80](https://tex.z-dn.net/?f=2x%3D80)
Dividing both sides by 2 we get:
![x=40\ feet.](https://tex.z-dn.net/?f=x%3D40%5C%20feet.)
<em>Thus, the actual diameter of the garden is 40 feet.</em>
Now, to get the area of the garden we get the radius and then put the formula of area:
Radius = ![\frac{Diameter}{2}](https://tex.z-dn.net/?f=%5Cfrac%7BDiameter%7D%7B2%7D)
Radius(r)= ![\frac{40}{2}=20\ feet.](https://tex.z-dn.net/?f=%5Cfrac%7B40%7D%7B2%7D%3D20%5C%20feet.)
![Area =\pi r^2.](https://tex.z-dn.net/?f=Area%20%3D%5Cpi%20r%5E2.)
![Area=3.14\times 20^2](https://tex.z-dn.net/?f=Area%3D3.14%5Ctimes%2020%5E2)
![Area=3.14\times 400](https://tex.z-dn.net/?f=Area%3D3.14%5Ctimes%20400)
![Area=1256\ square\ feet.](https://tex.z-dn.net/?f=Area%3D1256%5C%20square%5C%20feet.)
Therefore, the actual area of the garden is 1256 square feet.