The curved surface area of a cylinder is $8800 \, cm^2$. If the radius of the cylinder is $28 \, cm$,find its volume in $cm^3$.

The dome of a building is in the form of a hemisphere. Its radius is $4.2 \, m$. Find the cost of painting it at the rate of ₹ $18$ per $m^2$. (in ₹)

$1 \, m^{2} = \ldots \ldots \, cm^{2}$

Find the curved surface area and the total surface area of a hemisphere with a radius of $17.5 \, cm$.

Write True or False and justify your answer in each of the following:
The volume of the largest right circular cone that can be fitted in a cube whose edge is $2r$ is equal to the volume of a hemisphere of radius $r$.

Each of the radius of a cylinder and a sphere is $9 \, cm$. If the volumes of these solids are equal,find the height of a cylinder (in $cm$).