A circular sheet of paper is divided into two sectors. Central angle of one of them is `160^@`.
These sectors are bent into cones of maximum volume. If the radius of the small cone is 8 centimetres, what is the radius of the other?

A tent is in the form of a right circular cylinder up to a height of 3 m and them becomes a right circular cone with a maximum height of 13.5 m above the ground. Calculate the cost of painting the inner surface of the tent at Rs 10/sq.m if the radius of the base is 14 m.

From a circle of radius 15cm . A sector with angle 216 ^(@) is cut out and its bounding radius are bent so as to form a cone . Find its volume.

A solid is in the form of a right circular with a hemisphere at one end and a cone at the other end. The radius of the common base is 8 cm and the heights of the cylindrical and conical portions are 10 cm and 6 cm respectivly. Find the total surface area of the solid [use pi=3.14 ]

What is the perimeter of a sector of a circle whose central angle is 90^(@) and radius is 7 cm ?

A sector of a circular is of radius 12 cm and angle 120^(@) . It is rolled up so that two bounding radii are joined together to form a cone. Find the volume of the cone.