The volume of a right circular cylinder is ` 2 pi r h ` sq- units, where r = radius of the base and h = height of the cylinder.

If the volume of a right circular cylinder is 9pih m^3 where h is its height (in metres) then the diameter of the base of the cylinder is equal to___

The ratio of the volumes of a right circular cylinder and a sphere is 3:2. If the radius of the sphere is double the radius of the cylinder, then find the ratio of area of whole surface of the sphere and the cylinder

The volume of a right circualr cylinder varies as the square of the radius of its base , when its height is constant and as the height when the radius of the base is constant . The volume of a cylinder the radius of whose base and height are respectively 2 metres and 7 metres is 88 cubic metres . The volume and radius of the base of a cylinder are 396 cubic metres and 9 metres respectively . Detemine the height of the cylinder.

The total surface area of a hollow right circular cylinder = 2 pi (Rh + rh + R^(2) - r^(2)) sq-units, where R = outer radius, r = inner radius and h = height of the cylinder. TRUE or FALSE

If the volume of a right circular cone be V cubic - unit and the area of the base be A sq-unit , then the height of the cone is _________________.

By melting a sphere of radius r cm, if a right circular cylinder of same base radius made, then the height of the cylinder is r cm.

The perimeter of the base of a right circular cylinder is 'a' unit. If the volume of the cylinder is V cubic unit, then the height of the cylinder is____

Write whether the following statements are true or false : (ii) The radius of base , height and slant height of a solid right circular cone are r unit h unit and l unit respectively . The base of the cone is joint along the base of solid right circular cylinder. If the radii of the bases and heights of the cylinder and of the cone be equal , then the total surface area of the joint solid object will be (pirl + 2pirh +2 pir^(2)) sq - unit

If a solid sphere of radius r unit be melted to make a solid right circular cone of height r - unit , then find the radius of the base of the cone .

What will be the ratio of the diameter of the sphere and the height of a cylinder when the volumes of the sphere and the right circular cylinder are equal , given that the radii of the sphere and the cylinder are equal ?