56.547
9
452.38 feet = circumference1.) Formula for circumference (perimeter) of a circle = 2 x pi x radius OR pi x diameter(because 2 x radius = diameter)2.) Pi = 3.14153.) 2 x 3.1415 x 72 feet = 452.38 feet
2*72 feet * 3.141592=452.4 feet
A 20 foot round pool has a radius of 3.2 feet. So the pool has a volume of pi*r2*h = 101.86 cubic ft approx.
56.547
9
452.38 feet = circumference1.) Formula for circumference (perimeter) of a circle = 2 x pi x radius OR pi x diameter(because 2 x radius = diameter)2.) Pi = 3.14153.) 2 x 3.1415 x 72 feet = 452.38 feet
Circumference = 2*pi*72 = 452.3893421 feet
2*72 feet * 3.141592=452.4 feet
The radius of any circle is one-half the diameter.
It is: 2*pi*72 = 452.389 feet to three decimal places
A 20 foot round pool has a radius of 3.2 feet. So the pool has a volume of pi*r2*h = 101.86 cubic ft approx.
21 foot what? Radius, diameter or circimference? Presumably 4 feet deep?
Circumference = Pi x d: 3.14 x 16 = 50.24 feet
That question -- or ones nearly identical -- have been asked and answered here. Use the search tool at the upper right. Search on the following keywords: round pool 18 foot diameter Depth of the pool = 4 feet.Circumference of the pool = 18 feet. From the circumference we can find the radius of the pool.2(pi)(radius) = 18(pi) radius = 9Radius of the pool is (9/pi) feet.Volume of the pool = (pi)(radius)2(height) = (pi)(9/pi)24Volume of the pool = 324/pi cubic feet. Source: www.icoachmath.com
This question cannot be answered without more information. Does 21 foot refer to the length of a side of a square or rectangular pool, the radius or circumference of a circular pool? Is the pool of some other shape? What is its depth?