Find the ratio of the surface areas of two cones if their diameters of the bases are equal and slant heights are in the ratio of 4:3.

Find the total surface area of a cone, if its slant height is 21 m and diameter of its baseis 24 m.

Find the total surface area of a cone, if its slant height is 21 m and diameter of its base is 24 m.

The height of a cone is 21cm. Find the area of the base if the slant height is 28cm.

Find the total surface area of a cone, if its slant height is 9m and the radius of its base is 12m.

Show that : (i) a diagonal divides a parallelogram into two triangles of equal area. (ii) the ratio of the areas of two triangles of the same height is equal to the ratio of their bases. (iii) the ratio of the areas of two triangles on the same base is equal to the ratio of their heights.

There are two cones. The curved surface area of one is twice that of the other. The slant height of the later is twice that of the former. Find the ratio of their radii.

There are two cones. The curved surface area of one is twice that of the other. The slant height of the later is twice that of the former. Find the ratio of their radii.

There are two cones. The curved surface area of one is twice that of the other. The slant height of the latter is twice that of the former. Find the ratio of their radii.

The heights of two right circular cones are in the ratio 1 : 2 and the perimeters of their bases are in the ratio 3 : 4. Find the ratio of their volumes.

Find the curved surface area of a cone, if its slant height is 60cm and the radius of its base is 21cm.