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What is pi r squared times three to the fourth power?
(pi) R2 x 34 = 81 pi R2
How do you find the height of a cylinder?
The formula for the volume of a cylinder, which is h(pi)r2, is the area of the base (pi)r2 multiplied by the height (h). If you are given the diameter instead, remember that the diameter is twice the radius.So if we know that V = h(pi)r2, we can rearrange the formula in order to find the height.Divide the whole equation by (pi)r2. The result is: V ÷ (pi)r2 = h OR h = V ÷ (pi)r2.The formula h = V ÷ (pi)r2 means the height (h) is equal to the volume (V) divided by the area of the base (pi)r2.
What is the total area of a cylinder?
The volume of a cylinder is equal to Pi times the square of the radius times the height of the cylinder. Pi*r2*h. Pi*r2 is the area of the base of a cylinder. The surface area of a cylinder is 2*Pi*r2+Pi*2r*h. 2*Pi*r2 is the area of the base of the cylinder times two to account for both bases. Pi*2r*h is the circumference of the base times the height of the cylinder
What is the diameter of a circle whose area is 16π?
If radius = r, then area = pi*r2 So 16*pi = pi*r2 so that r2 = 16 and so r = 4 Then diameter = 2*radius = 8 units.
How do you find the radius of a cone knowing only the height and volume?
The volume v = (1/3) pi r2 h You just need to rearrange this to get r on its own. Multiply both sides by 3: 3v = pi r2 h Divide both sides by pi: 3v / pi = r2 h Divide both sides by h: 3v / (pi h) = r2 We get an answer for the radius which is the square root of 3v / (pi h)
