16. Write the ratio of the curved surface and base area of a semicircular solid.

Write the formula to find the curved surface area of a cone

The ratio of the curved surfaces areas of a solid right circular cone and of a right circular cylinder both of same radius of base and of same height is 5 : 8 . Then find the ratio of their radius of base and height .

The ratio of the curved surface areas of two right circular cones of equal slant heights is 2:3 . Then what will be the ratio of their areas of bases of the two cones ?

Area of curved surface of a solid sphere is equal to the curved surface area of a solid right circular cylinder. If the height and the length of diameter of the cylinder both 12 cm in length, then calculate the radius of the sphere.

Height and base radius of a cone are equal. Find the ratio of the curved surface area for this cone and a solid hemisphere of equal base radius.

A solid hemisphere has radius 14 cm. It is melted to form a cylinder such that the ratio of its curved surface area and total surface area is 2 : 3. What is the radius (in cm) of its base?

As shown in the adjacent figure, a sphere is placed in a cylinder. It touches the top, bottom and the curved surface of the cylinder. If radius of the base of the cylinder is 'r', (i) what is ratio of the radii of the sphere and the cylinder? (ii)what is the ratio of the curved surface area of the cylinder and the surface area of the sphere? (iii) what is the ratio of the volumes of the cylinder and the sphere?

A sphere and the base of a cylinder have equal radii. The diameter of the sphere is equal to the height of the cylinder. The ratio of the curved surface are of the cylinder and surface area of the sphere is __________.

The ratio of curved surface area of a right circular cylinder to the total area of its two bases is 2 : 1. If the total surface area of cylinder is 23100 cm^2 , then what is the volume (in cm^3 ) of cylinder?

The ratio of curved surface area of a right circular cylinder to the total area of its two bases is 2:1. If the total surface area of cylinder is 23100 cm^2 , then what is the volume (in cm^3 ) of cylinder?