Volume and surface area relationship

[user44]

Does the height of the cylinder need to be 4 also for this relationships to be true? or just the radius of the cylinder base?

It’s mentioned that this is true for rectangular solids too. what does that mean - is it that both the length and the width needs to equal 4, for the SA of the solid to equal its volume?

[Leaderboard]

In this case, both (that is, the surface area and volume of a cylinder with radius and height 4 are numerically equal).