The radii of the base of cylinder and a cone are in the ratio of 3 : 4 and their heights are in the ratio of 2 : 3, then the ratio of the volumes is ……………

A circus tent is cylindrical up to a height of 4 m and cone above it. If the diameter is 105 m and its slant height of cone is 40 m., then the total area of canvas required to built the tent is …………

An iron spherical ball of volume 232848 $c{m}^{3}cm^3$ has been melted and converted into a cone with vertical angle of 120°. Then the height of the cone is

If a cylinder and cone have bases of equal radii and are equal heights, then the ratio of their volumes is

If the curved surface area of a cone is 4070 $c{m}^{2}cm^2$ and its diameter is 70 cm, then its slant height is

Under the usual notations, the total surface area of a cuboid is

A joker’s cap is in the form of a right- circular cone whose base radius is 7 cm and height is 24 cm. The area of the sheet required to make 10 such caps is

A right-circular cylinder has base radius 14 cm and height 21 cm. The curved surface area is

The volume of the sphere of radius 21 cm is

A sphere, a cylinder and a cone have the same radius and same height, then the ratio of their curved surface areas is