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Because the volume of the cylinder is proportional to the cross sectional area of the cylinder. The cross sectional area is a circle and the area of a circle is pi*r2.

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Q: Why do you square the radius when finding the volume of a cylinder?
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The volume of a circular cylinder varies directly with the height of the cylinder and with the square of the cylinder's radius If the height is halved and the radius is doubled then the volume will be?

The volume of a circular cylinder varies directly with the height of the cylinder and with the square of the cylinder's radius If the height is halved and the radius is doubled then the volume will be increased.


How do you get the radius of a cylinder if you have the volume and the height?

The square root of (volume / height / pi)


To get the volume of a multiply pi by the radius squared and then multiply by the height.?

That is correct for finding the volume of a cylinder.


How do you find the radius of a cylinder if the volume is 100 and the height is 5?

Pie radius square


Formula for finding volume of semi cylinder?

V = (pi * radius * radius * height)/2 ie. formula for the volume of a cylinder divided by 2


Finding the volume of a cylinder with 9 radius and 7 height?

1,781.3 cubic units.


What is the formula for finding the height of a cylinder when you have the volume?

divide the volume by 2*pi*r where r is the radius of the base


How do you calculate the radius if you have height and volume?

(assuming its a cylinder) volume = pi * radius2 * height so: radius = square root ( volume / ( pi * height ) )


What is the formula for finding the area of a circle and for finding the volume of a cylinder?

Area of a circle = (pi)r2 [Areacircle = pi time the radius squared.] Volume of a cylinder = (pi)r2h [Volumecylinder = pi times the radius squared times the height.] (This applies to a right circular cylinder. :)


What is volumn when height is 15 and radius is 7?

Presumably the question is about finding the volume of a cylinder? Volume of a cylinder = pi*radius2*height Volume = 2309.0706 cubic units


What is the formula in finding the height of a cylinder?

The answer depends on what information you are given: volume and radius or diameter, or surface area and radius, etc.


What is the volume of a cylinder with a radius of 3 cm and a height of 8 cm best answer?

The volume of a cylinder with a radius of 3 cm and a height of 8 cm is 709.8912 square centimeters.