A Sphere

[wised]

A Sphere with a diameter of 16 mm has the same surface area as the total surface of a right cylinder with the base diameter equal to the sphere diameter. How high is the cylinder?

 

[stapel]

If the sphere's diameter is 16 mm, what is its radius? Plug this into the surface-area formula for a sphere. Then take the total-surface-area formula for a cylinder, and plug in the given radius value and the surface-area value you just found. Solve for the height "h".

Eliz.