A hemispherical piece of wood is to be mounted at the end of a cylindrical wooden log with the same base.
If the length of the log is four times its width, then what is the percentage increase in its total surface area?
If the volume of a hemisphere is four times its total surface area, what is its radius?
A log of wood is cylindrical in shape.The radius and height of the log is 1 cm and 6 cm respectively. What area needs to be covered if the log has to be painted completely ?