A metallic solid made up of a cone and a cylinder is given in the figure. The radii of the base of the cone and cylinder are equal. The height of the cylinder is 40cm, the height of the cone is 24cm and the radius of the base of the cone is 7cm.

1. If the radius of the base and the slant height of the cone are given then write the formula for finding the curved surface area of the cone.
2. Find the volume of the solid object.
3. Compare the volume of the cylindrical part and the volume of the conical part.

In the figure, cone is filled with ice-cream whose upper part is hemispherical. The slant height of the cone is 25cm and its radius is 7 cm.

1. Write the relation among the height (h), radius (r), and slant height (l) of the cone.
2. Find the total volume of ice-cream in conical and hemi spherical parts.
3. Compare the quantities of ice-cream in the conical and hemispherical parts.

In the figure, a conical object with slant height 25 cm and a hemispherical object with radius of 7 cm is composed to make a solid object.

1. What type of triangle is formed when the vertical height of the cone is drawn in the given figure? Write it.
2. What will be the total cost to paint the solid at the rate of 25 paisa per square centimeter? Find it.
3. What is the volume of the solid object? Find it.