A cylindrical drum has a height of 20 cm and base radius of 14 cm. Find its curved surface area and the total surface area.

The curved surface area of a right circular cylinder of height 14 cm is 88 cm² . Find the diameter of the cylinder.

A garden roller whose length is 3 m long and whose diameter is 2.8 m is rolled to level a garden. How much area will it cover in 8 revolutions?

If one litre of paint covers 10 m², how many litres of paint is required to paint the internal and external surface areas of a cylindrical tunnel whose thickness is 2 m, internal radius is 6 m and height is 25 m.

If the total surface area of a cone of radius 7cm is 704 cm², then find its slant height.

Find the diameter of a sphere whose surface area is 154 m².

The radius of a spherical balloon increases from 12 cm to 16 cm as air being pumped into it. Find the ratio of the surface area of the balloons in the two cases.

If the base area of a hemispherical solid is 1386 sq. metres, then find its total surface area?

A sphere, a cylinder and a cone  are of the same radius, where as cone and cylinder are of same height. Find the ratio of their curved surface areas.

The slant height of a frustum of a cone is 5 cm and the radii of its ends are 4 cm and 1 cm. Find its curved surface area.