Show that a cylinder of a given volume which is open at the top has minimum total surface area, when its height is equal to the radius of its base.

Show that a cylinder of given volume, open at the top, has minimum total surface area if its height is equal to radius of the base.

Show that the height of the cylinder, open at the top of given surface area and greatest volume is equal to the radius of its base.

Show that the height of a cylinder of given total surface area and open at the top has maximum volumes is equal to the radius of its base .

Show that a closed cylinder of a given volume will have its least surface when its height is equal to its diameter.

Show that the right circular cylinder, open at the top, and of given surface area and maximum volume is such that its height is equal to the radius of the base.

Show that the right circular cylinder, open at the top, and of given surface area and maximum volume is such that its height is equal to the radius of the base.

Show that the right circular cylinder,open at the top,and of given surface area and maximum volume is such that its height is equal to the radius of the base.

A closed cylinder of given volume will have least surface area when the ratio of its height and base radius is