The answer depends on whether the 4 foot measure is the radius or the circumference.
Its radius is: 8/2 = 4ft
A circular fountain at a park has a radius of 4ft. The mayor wants to build a fountain that is quadruple the size of the current fountain . Find the length of the radius of a new fountain?
The area is 9.2376 square feet.
The surface area is 377ft2
25.12ft
The answer depends on whether the 4 foot measure is the radius or the circumference.
The circumference of the circle that has a diameter of 4 feet is: 12.57 feet
Its radius is: 8/2 = 4ft
A circular fountain at a park has a radius of 4ft. The mayor wants to build a fountain that is quadruple the size of the current fountain . Find the length of the radius of a new fountain?
The area is 9.2376 square feet.
The surface area of this cylinder is 376.99ft2
The surface area is 377ft2
4*pi = 12.56637061 feet
A round pool with a radius of 9 feet and a depth of 4 feet has a capacity of about 7,615 gallons of water.
I assume that you mean it's 4 ft in diameter, and you want to know the number of Sq Ft in the top. If so, the Area is equal to (Pi) X (Radius squared.) OR Since the Radius of a circle is 1/2 the Diameter ... the answer is [(4/2) X (4/2)] X Pi OR 4 X 3.14159 == 12.56636 Sq Ft
A circle is a 2-dimensional plane figure. The volume of any circle is zero.The volume of a sphere with 4-ft diameter is (32/3) x (pi) = 33.51 cubic ft (rounded)