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Question 186817: What is the circumference and area in feet of circular pool that has a diameter of 20 yards?
Answer by feliz1965(151)   (Show Source):
You can put this solution on YOUR website! Circumference is the perimeter of a circle.
The formula needed to find the circumference is C = pi(d), where pi = 3.14 and d = the given diameter.
C = 3.14 x 20
C = 62.8 yards
We now need to convert 62.8 to feet.
1 yard = 3 feet
How many feet = 62.8 yards?
We divide to find the answer.
62.8 divided by 3 = 20.93
The circumference is 20.93 yards.
The area is found by using the formula A = pi(r^2), where pi is again 3.14 and r represents the radius of the circle.
You were given a diameter of 20 yards.
The radius of a circle is 1/2 the diameter length.
What is 1/2 of 20? It is 10.
So, the radius = 10 yards.
We now can use the area formula.
A = 3.14 x (10)^2
A = 3.14 x 100
A = 314 yards
We must now divide 314 yards by 3 feet per yard to convert from yards to feet.
314 divided by 3 = 104.7 feet
The area, in feet, is 104.7 feet
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