The diameters of two cones are equal. If their slant heights are in the ratio 5 : 4, find the ratio of their curved surfaces.

How many metres of cloth 5 m wide will be required to make a conical tent, the radius of whose base is 7 m and whose height is 24 m?

The curved surface area of a cone is 4070 cm² and its diameter is 70 cm. What is its slant height? (Use π=22/7).

The total surface area of a cone of radius and length 2l, is

The area of the curved surface of a cone of radius 2r and slant height , is

Find the length of cloth used in making a conical pandal of height 100 m and base radius 240 m, if the cloth is 100π m wide.

Find the area of metal sheet required in making a closed hollow cone of base radius 7 cm and height 24 cm.

If the radius and slant height of a cone are in the ratio 7 : 13 and its curved surface area is 286 cm², find its radius.

Find the area of canvas required for a conical tent of height 24 m and base radius 7 m.

The height of a solid cone is 12 cm and the area of the circular base is 64π cm². A plane parallel to the base of the cone cuts through the cone 9 cm above the vertex of the cone, the area of the base of the new cone so formed is